I think this problem expands to tech meetups. It is very difficult to find a quality meetup. Most people never used the tech and the presenters make gross errors. Most recent I remember was a person trying to explain why GraphQL is good for APIs, while showing code with crazy N+1s. Certainly didn't convince me.
I'm not saying everyone should be an expert, but I would want the whole spectrum of experience represented. Now I don't invest time in meetups any more.
Meetups cater almost exclusively to younger people who want to learn something and socialize.
I don't think it is particularly wrong, but more experienced people tend to be older and less likely to have inclination or time to prepare talk or go to pub every week or so.
I'm not saying everyone should be an expert, but I would want the whole spectrum of experience represented. Now I don't invest time in meetups any more.