Well articulated. It's something I've often tried to put across - no amount of dice-fettling abilities will ultimately help you on the day the dice gods decide you're going down, but that is not the same as "there's nothing I could have done".
Whether it's rolling a shedload of dice with 'just focus' or a smaller lump of dice with target-lock-and-force, there's still the potential for the dice to come up tilt.
Don't assume that on the day it does, you did it wrong, and don't assume that on the day a ship of yours decides to dance between the laser bolts that you did it right.
I can't agree more with the notion of determining if you made the right set of decisions regardless of the outcome. This is such a huge step to getting better. This is something I constantly look at myself playing tennis. Regardless of the outcome, did I choose the right shot for that situation.
A recent example for me was Vader (1 shield remaining) vs 2 X wings, behind him, but spread out. Having a lock on one, I chose the Talon Roll with an afterburners boost to arc dodge 1 of them, get into range 1 of the other X-Wing that had 2 hull left. Vader has a lock and 2 force vs his 2 die with a focus. I am a high chance of initiative killing him (87%), However he scrapes by with an inconsequential crit after rolling 2 focus results, with my force depleted. He then takes the shot back at my 4 health Vader and rolls 4 hits (he did have a lock, but didn't need it), Vader blanks and dies.
Looking at the odds, I felt I got it mostly right, take the (somewhat) aggressive play to take down this X-Wing, with a high expectation that I would only be taking the one shot even if it lived (albeit, highly modified). The odds of that outcome is quite low (like 1% when looking at the 13% chance the ship lives, and the 7% chance it can deal a killing blow) However, I note that I did leave myself open to variance in that instance. I was marginally down in points (totally mangled my early engagements) with Vader my only piece left, so it wasn't a defensive play (other than using offense as a defense). However, it also set me up well for the next turn to bug out as I would be up on points whilst the other X-Wing had to turn around. Was it worth it? I feel it was mostly correct looking at my choices, particularly as we were near time, and that kill secured me a points win.