One thing I've noticed on Mumsnet is that people never actually suggests the type of baby names that the OP likes/asks for example if someone came here and asked “what’s are good sibling name for?”…. And their first child’s name was what mumsnet would call a a “ trendy and American” name like Paisley, Hunter, Harper, Jaxon Etc. (i don’t really like these names but I’m using them to prove a point) a lot of the people in the comments don’t even suggest similar names, the suggest old classic names like Josephine, Ophelia, Atticus that are clearly not the OPs taste.
Like if the OP has a first child with a trendy name like Harper they won’t won’t their second child to be called an old name like Olivia will they. I do feel like there is genuinely a lot of snobbery that comes into it aswell, like a lot of people on here try to make the parents choose a “classic” name because they themselves don’t like the modern ones even though it would look silly and out of place with their first child's name. Sorry for the rant it’s just been something I’ve noticed here recently.