Personally, I have never gotten the hype by the names “baby,” “babe,” “bae,” “honey,” it feels forced to me. I’ve seen those TikTok videos where as a joke people will address their spouses by their real names and the spouses get mad and say something like “my family and friends can call me that, but you can’t.” I’ve never gotten the seriousness of it. If we already know we’re boyfriend and girlfriend, or husband and wife, why should I have to address you by those names? Again, I’m not saying there’s anything wrong with saying them, but using real names should become more common as well.
You are definitely misreading what they said. The meaning you attribute doesn’t make any sense in the context of the post and the remainder of their comment.
“Nobody I know doesn’t eat onions.” is equivalent to “Everybody I know does eat onions.” but not to “Everybody I know eats nothing except onions.”