If we just ban all advertising then there are no more SEO optimized sites trying to get that ad-revenue. So hobbyists should have no trouble with popularity if the ad-supported internet goes away.
hobbyists who may one day want to have a lifestyle out of this wouldn't benefit. And those would be the sites that have a reliable stream of content instead of maybe a burst of content for 2 months before getting bored or burned out and maybe making a piece of content every 5 months afterwards.
For all the negatives, a consistent stream is one of the biggest benefits from professional content creators, be it traditional news, Youtubers, streamers, or even bloggers.