"Hey gitgud carebear" would those people say...
Nah, we'd say "this is how to survive in Open, if you want. If you don't that's cool"
There's resistance to a PvE group for the following reasons (in order of validity IMHO):-
1. Dev time spent creating, testing and implenting it vs time spent dealing with actual bugs and developing gameplay (yes I'm flogging the piracy, BH, smuggling horse again)
Mitigated by removing the cap on PvE groups like Mobius (to give parity to those PvE inclined), yes as @Robert Maynard says there is an implicit trust factor as actual PvP damage isn't removed entirely, therefore better admin tools, or dare I dream for actual moderated FD Support (=yes I am). I'm no software developer so I'm not sure whether the reason this doesn't exist is trivial or not. Surprising it hasn't been done already tbh.
2. "BUT DOSE CARB3ARS EFFECT MAI BGS/PP/OTHER!!!!1111one!!"
Monumental mis-understanding of how the BGS, instancing and PP (in it's current implementation) works. Can be easily disregarded as the ravings of a loon.
That's it I think.
edit:- and what @Bigmaec said.