I think that's fair -- it's the same reason people post on the baby names forum, because they want opinions from strangers who don't feel the need to be tactful or sugarcoat responses, the way friends and family may.
I agree there is absolutely a scattering of assholes on here, as you will get anywhere, but whose asshat qualities are probably 'enhanced' by anonymity.
I think it's also worth pointing out, though, that Mn has a disproportionate number of lonely people who struggle with friendships and relationships in general, and whose main social 'outlet' is being on here. I do think that this warps some of the advice and norms on things like friendship issues on here, because, frankly, many of the people giving their input have some very strange, reactive ideas about taking offence over very minor things, 'cutting people off' for not adhering to a fairly arbitrary set of 'friendship rules' etc.
I don't, for instance, think most people who are exposed to the ordinary social world of other people via friendships and collegial relationships in the workplace, regard the school run as a source of stress and horror and self-consciousness, or get quite so exercised about a solo luncher occupying a six-seater picnic bench, or 'reciprocal' bridesmaid arrangements.
And because some of these posters don't really have friendships in the real world, they get their ideas about friendships from on here, often from other people who don't really have friendships in the real world either, which means there is a weird feedback loop of stuff about cutting people off, 'Wendying', friendships inevitably involving crises, exploitation and drama, opposite-sex friendships as 'dangerous' or inevitably ending in someone making a pass, 'I have no time for friends, I'm just happy with my own little family' etc etc.
I mean, obviously, this is far from everyone on here, but I do think it contributes to some slightly odd 'norms' to do with relating to other people on here.