I don't think a lot of people have a problem with AI summaries (a lot of people are using AI for exactly that). I think the 'hate' mostly comes from the fact that people tend to copy/paste whatever AI says without adding anything to the conversation.
It's the same as me running a query on Google and copy/pasting a list of 10 results. It doesn't really add anything to a conversation - anyone can go to Google and look something up.