It’s a good question. You probably know more about tea than the average Lemmy user and most Lemmy users. The fact that there may be one or two people who know more than you do does not disqualify either claim. But OP’s post description is basically about knowing more than any other Lemmy user — and that’s hard to say.

I don’t think you could be better than any one other person at most things on, say, Reddit, but Lemmy is much smaller, and much more focused on certain areas. If you fall outside those areas, you likely have a few advantages in expertise. Tea being one of them as social media in general leans more toward coffee.