Reading Navis Primer I found out how insane difficult the warp travel even between nearby star systems is.It also seams that the general consensus that space travel is rare and extreamly difficult.The players and GMs here I believe they try to push to make warp travel as unsafe and helish as possible.
It seams that even for elite rogue trader navigators warp travel is a very dangerous undertaking, a bit touch and go.It seams that if verry good navigator PC warp travel is very dangerous for the vast majority of NPC navigator warp travel would alright impossible. The vast majority of the ships that would travel through the warp would no longer reach their destination at all. To loose so many ships it also require the IOM shipyards to build ships extreamly fast so that IOM can have ships to service the empire needs.
That is all good from RP perspective to have not even the elite navigators have a safe warp travel ,but realisticly for the IOM to exist you need to have warp travel be safe for the common navigator and ship,most of the time.
So the question is how realisticly hive worlds that are not self sufficient and agriworlds relegated to exporting luxury food for the rich,could survive and not colapse in years? So a IOM with this level of warp travel would not have any hive worlds in a matter of of decades.
Because importing food to feed tens of billions of people(the lower limit of a hive world) from another starsystem require a certain stability and safety of traveling through the warp that the books and GM would make impossible. Also because of how small the cargo space is even for the biggest transport ships(because of ballance issues regarding ship components) even feeding an entire hive world in a timelly fashion would require a huge amount of transport ships that go against of the rarity of the ships in the universe? Not to menshion of all the mineral resources the hive world imports and all the goods that the hive world exports will need a huge amount of ships that will need to service the hive world around the clock.
You cannot biological feed a human population mostly through canibalism and not have that human population colapse in a few short generations.
Even if the hives are food independent and only the rich imports any food they would still need huge amount of ships servicing the hive world for the minerals imported and goods exported.
If the hive worlds are mostly food independent why agriworlds still exist? The luxury foods could be easily grown on civilized worlds and they would easily met the demands of the rich hive world elite.
Not to menshion of huge behemonts like Necromundia in terms of population.
Also realisticly if space and warp travel is extreamly rare ,you need to have your armed forces be extreamly good at killing the enemy not crap for the IOM to survive even 1k years with the huge threats they have to fend from day to day. Not even blind fanatism would sterm the harsh reality that if warp travel ships are rare you either equip and train your soldiers to be extreamly good at killing the enemy or your political entity would cease to exist in less of a 1000 years. So the cost of equipment and training of IG would hugelly be overshadowed by the cost of transport of the IG from the recruitinng worlds and to the front. So the IG would have to be extreamly well suited at killing the IOM enemies in the shortest amount of time. You cannot aford atritional warfare in any shape and form and you must suplement your limited numbers that you can deploy by superior tactics and equipment than the enemy can have. Most of the enemies have a easier time to get reinforcements and equipment than IOM (as the fluff tends to depict) and will always outnumber the IG in almost any battlefield in the Galaxy.
When the IG is confronted by threats like chaos,eldar, dark eldar, or alien races one more horific than the other each and every day at almost on any front, and the IG would fold like tissue paper. It seams that the above threats are the most common threats the IOM are confronted,from how the fluff depicts them. Would not the IG be efective against those threats or if they continue to be morons would not the IOM would not survive to see the second milenia after the HH?
Please help me make sense of the universe how can the IOM be depicted in one way(near imposibility of the warp travel between star systems,extreame rarity of ships, and ability to replace ship loses,extreame level of the enemies,the ease of how the IOM enemies can bring enourmous amounts of elite troops faster and easier than the IOM) and have elements that are in direct contradiction with the depiction(non food/resources independent hive worlds,hive worlds and forge worlds as central hubs of industrial production,the division of labor among of the IOM planets, the utter crap and insane strategies(based on attrition warfare ) of the IG to stop those threats,massive internal infighting) and have the IOM still surviving 10k-11k years after the HH in a believable way?
I know that the rule of cool is mostly the reason why there is the problem in the first way but I would like and answer that makes sense and not a joke answer.
Thank you for the time and consideration.