To be honest, many newcomers to flight sims get "owned" badly by experienced pilots or well-equipped pilots. Instead of worrying about a little gore and the mental health of the people who see it from 200 meters distance I believe the mental effect of newbies getting owned constantly is much worse.
Also I doubt there would be many flight sim veterans who'd get mad about blood effects.
I do agree on the added development effort though and that there would be better things to invest time on. For example my thread about new game modes!
