I'd like some input here as someone who exclusively plays in open.
For the same reason I use the ignore function at the slightest provocation in the forums here. Bluntly, "Hell is other people." in some settings, there is an expectation of likemindedness and pleasant interactions - like fans of the same band attending a gig and so on, but in almost every situation, other people are bad news.
You think that we should play in open, and if we don't, we are going against what the game means. Well, of course you do. That would mean there were more people for you to kill... and yes, we are going against what the game wants. because the game wants us to be cannon fodder for people who want to kill others, or turn into killers ourselves.
I love playing this game - I enjoy exploration, and had an absolutely brilliant time flying S&R missions in the last CG.. but I don't suspend my morality when I pull on my VR helmet... Open is a hideous environment. The Universe of Elite is a deeply unpleasant dystopia, and this is by design. The game authors reject a noble Star Trek version of humanity in space, and instead have built one where people behaving like the Reavers from Firefly are rewarded rather than punished. In that scenario, the most sane thing to do is simply avoid everyone.
I have had maybe one or two interactions with other humans in ED that have been surprisingly pleasant. The number of murder hobo encounters I have had outweighs that many, many times over, hence, I no longer play in open.