I would consider turning my ad blocker down or off if:
Ads got less annoying. Many ads are profoundly obnoxious.
Ads got shorter. I really don't need your bizarre little comedy skit; some of my favorite ads are just "Hey Burger King is selling a burger with onion rings and barbecue sauce on it. You should be able to sell me a cheeseburger in ten seconds.
Ads got less repetitive. I have blacklisted so many products and companies because of overly repeated ads. I will not forgive Dr. Squatch for reminding me every minute that I'm not a dish, I'm a maaan.
Youtubers form a union and begin collective bargaining with Alphabet the way the record labels do.
Political and pharmaceutical ads are outright banned from all forms of broadcast. I absolutely will not ask my doctor about maximum strength shitabrick, and if I wanted to be lied to I'd ask my mother how I look.