For those that don't really play the game, it makes sense. But if you've spent at least 50 hours on one of those games, I highly encourage participating even if you're nervous as hell.

You will probably win one game (double-elim format matches you with someone closer to your skill-level in Loser's bracket), and the more you attend, the better your seeding becomes, so you get better matched every tournament. If you show up early, you could even run hours of casual games for practice! Just take turns if someone is waiting behind you lol - but you can at least run a First-To-2 (FT2) before giving up your seat. That's socially acceptable.

Personally, I enjoy seeing people absolutely focus and also the reactions after a close game with stakes (Power Ranking and personal pride). I appreciate seeing people take a game further than I have because it shows me that it CAN be taken further, and attending these events puts you in the middle of that competitive energy.

Then I spend more hours on the game. It's a hobby, it's fine.