This sounds like the same cope that boomers give about college football and college basketball being better than the pros. Why wouldn’t you watch the best of the best?
Whichever pro team is closest to you, go watch a playoff game, at some point. The atmosphere is electric. Jr hockey is super fun to watch, depending on the fan base. Sometimes, depending on the program, they attract a lot of fans. Some other teams barely fill the seats, so the experience, as a fan, can be mediocre.