Not to me. Playing an Apothecary myself, I am astounded that we have to requisition such signature items for our specialty. My Apothecary has unexpectedly turned into the biggest Requisition dump in the squad, because I'm spending 35 requisition a mission on what I consider basic gear for my character. 15 of that is a jetpack, which I have no problems paying for. Because while it makes tons of sense for my character due to his background as a Ravenguard and for practical reasons because the extra mobility means you can get to your patients faster and so heal them faster, it's not something traditional to an Apothecary. The other 20 for the Diagnostor helmet and chainsword, things you see on pretty much EVERY Apothecary art or fig EVER, I am significantly less happy about. While everyone else is using Signature Wargear to get cool weapons, I've had to use it to get my helmet. Very embittering. As much as having that bolter has helped, I would have been much happier paying my 5 requisition for that than I am paying 5 requisition for the chainsword because even though a PC Apothecary will probably end up with both the chainsword is the iconic weapon for them, not the bolter.
I don't think it's a surprise to most people that a starting character is really well equipped tactical marine, basic devastator or assault marine or an under equipped Techmarine / Psyker / Apothecary.
Just from a points / balance cost it's not really possible, For example, Techmarines come with Artificer armour and a back full of mechandrites as standard in the TT but you can't let that be starting equipment in the RPG if other people have the current starting gear. Most chapters have a Techmarine / Psyker / Apothecary per company so equipping most Deathwatch kill teams with one or more of the three is going to be going in the training list somewhat who are fully capable Space Marines in their own right, just not a level they are used to showing us.
So yes when you are a bit short of points anyway some flexibility would be nice, any req for req change (within reknown ranks) i'd at least hear. Not sure I'd let someone trade out their combat knife or bolt pistol.