Not denying your experience, as it's probably true that the folks you've seen pursuing serverless may be misguided, but I want to contest your last point where you say "not many people" would benefit from serverless.

I would say that "literally any single person" benefits from serverless if they don't have the skills, knowledge, or time to handle the server/infrastructure responsibilities that come from running software.

If I'm a one man development shop with a sufficient budget, I'll probably find it far more productive when using serverless architecture to host my business logic than not.