People tune in to watch the best players in the world play to begin with.
Here's my take:
The Wah's were insanely distracting and obnoxious and should have been stopped by the organizers with a polite announcement: "Lets keep the focus on the runners, give them your support but don't be distracting!"
Cheering should always be encouraged, and has never been a problem in previous SM runs, obviously quiet time during tough tricks is good, but not allowing applause after successfully getting a trick is a terrible idea.
These guys are indeed the best in the world, and can easily run these games with cheering and applause (and 3/4 have run this game at a GDQ before); in fact I'm sure they appreciate it. I've watched Zoast and Behemoth a ton, and I know they're very chill dudes.