Friendly kills may always happen, but they can be reduced. You seriously just made the argument that "people are always going to die, so there's no point for the medical field to exist, or safety measures like airbags". "GCI will always happen. No matter how technologically inferior the equipment the reds have, GCI is inevitable as it is in real life too. I quite often get mistaken as an F-5 when flying the MiG-21. The F10 map would solve the problem because depending who the player is, he isn't going to pull the trigger as quickly as other potential teamkillers, and may have the decent sense to quickly check the F10 map in case neither of us are on SRS, the microphone doesn't work or SRS is bugged or grandma is sleeping etc".
I'm not asking for a map with the fog of war completely removed, I'm asking for a stand-in for what we would know if we had a GCI. A...Simulation, if you will. I've at least proposed a solution to a current problem, rather than make a blanket statement with zero evidence of a potential reduction of FF incidents. I at least had the good graces to do some quick research, and notice there were more A2A friendly fire incidents with guns during WW2 in single years, than there were A2A friendly fire incidents using missiles and guns during the whole 20 years of the Vietnam war.