I do find this an interesting topic.
Part of me thinks, if you ask for an opinion then expect everyone to give theirs freely. However, what I find strange on this forum is people being so dramatically negative about some really standard names that no one else would bat an eye at. Like some have said in the replies, perhaps people find it useful to get others perception about a name, but I've seen people ask for opinions on pretty common names and they'll have replies suggesting they are dooming their future offspring to a life of misery and pain. The name will be Poppy or Luna or Alfie or something of that ilk - a name hundreds of people have and likely live with without any issues.
Whilst I sometimes wonder why people ask for opinions on names if they don't want to hear negative feedback, I also wonder why some people seem to relish telling a poster they really dislike their name choices. I'm not sure I would go as far as to say it's bullying, but I do get the impression some people on MN find joy in slagging off a name (again, quite often names that are perfectly normal, nothing that outlandish). I really struggle to understand why they find joy in this. Is it because no one asks for their opinion in their everyday lives so they delight in giving it on here? Or they enjoy the freedom that comes with giving an opinion behind the safety of a screen? Are they really hoping they will have a direct influence on what the poster names their child? The psychology behind people giving opinions out interests me more than why people ask for opinions.
I have started a thread on here before to ask for opinions on names, and will likely again in the future, but that's mainly because I enjoy discussing names, not because I'm really invested in what some random women on the internet think about the names I like. I agree with what some others have said, I don't feel those that post on this name forum are very reflective of society's views as a whole. Some of the references people make when a particular name is mentioned go completely over my head, so I've long assumed a lot of posters on here are from older generations (I could be wrong though!) If opinions on here aren't reflective of society, and possibly niche, I do question how useful they are for those starting threads and asking for views.
I sometimes get the impression that some people think they're providing a public service by trying to put a poster off a name. It's like, no, love, it's simply a name not to your taste and that's ok, we don't all need to like the same names. If every baby girl born was called Elizabeth the world would be a very boring place.