There are, don't worry. I know at least 5 people here on the forum from the top of my head. But i wouldn't call any of them experts and neither I would call myself that.

If I had to put a label on myself I would say Tennis expert first, than eSports, then Snooker, then Football. But that would be in order how much money they make me when betting on them. I know by far most about football but bookies know everything there and there is no advantage to be made. I just started following eSports in covid era when all else was stopped and I stayed since they are so easy to take profit from. Missing way too much history there to be expert but it doesn't really affect me negatively due to the patches and meta changes.

If you want real eSport expert, try following this guy - Rand. Learned a lot from him. Not really active lately but came back for The internationals.
https://bitcointalk.org/index.php?topic=5193560.msg62994167#msg62994167