I run one and I have for a long time. I also personally don't even like the idea of a fan channel either lol. I totally get why they irritate people as a lot of them are performative and I do believe the intention behind some of them is attention seeking or opportunistic. Not all, but some. You can usually tell quite easily.
I dont expect anyone to believe me, but for me it's genuinely just the case that I enjoy chatting to people and about things I love, and I enjoy creating things. I've been like that since I was a kid. It's a compulsion. I'm an incredibly sociable person and I find chatting about City on videos an awful lot of fun. It's something that comes natural to me.
I'm of course biased, but I do think there's value in them to an extent. We're all incredibly busy and it's nice to have someone chat City that you like listening to. A sort of parasocial relationship, but that's 2026. I think overseas fans are less likely to have fellow city supporting mates too so it helps them feel a little more informed. I think the appeal is that we're inherently social creatures and these fan channels fill a tiny gap for some people. It is what it is.
Ultimately, as with anything, there are good examples and there are bad examples of these things. I tend to feel we should just let people enjoy what they like and not worry about it. we all like different things.