Full disclaimer - I was the faculty sponsor for e-sports for two years at the high school where I work. I may be a little biased here - the tournaments my kids set up were small and local, and honestly 95% Smash Bros. They were disorganized and a hot mess sometimes, because that’s what happens when you have a bunch of teenagers planning things.
They brought the kids together, though. The tournaments helped the kids understand how to plan events, gave them an outlet for marketing creativity on open house nights, and gave them a place to hang out once a week.