The simple fact is that killshooter is needed. The solution I would suggest to bury this debate once and for all is for hitech to switch it off along with friendly collisions and friendly flak. Announce it well in advance and watch what happens. Say for a period of hours or a day or whatever.
I think that would stop the debate cold as the mayhem breaks out. Quite simply this is a mere simulation of war, a game whether we like it or not. We cannot really die and we feel no guilt if we causes someone else to die. There are no real consequences of our actions unlike in real life.
Lets say Pilot X steps in and steals a kill from me. Now I'm

From now on every time I see his icon. I will latch onto his six and down him. Naturally he dislike this and retaliates. But I have friends and they murder him every time he appears. But he has friends and they have friends and friends of friends. Soon we are organising missions to wipe out the opposing groups from our own country. Civil war. Ok it's an exaggeration. But retaliation and grudges would happen.
Accidental collisions would be frequent and it would be difficult to land kills.
You couldn't go near friendly bases under attack as the friendly fire would down you.
Without killshooter the game becomes a free for all which would be fine but what limited realism there is would be gone. A deathmatch.
Does anyone want that?