I'm old enough to remember when one of great things about the web was the low barrier to entry.
Not every site has a large company with deep pockets behind it. Some of the websites I've run, I've run at a loss because I was interested in the subject and thought it provided real value for other people. Probably the income from these sites was in the hundreds of dollars a year range, the cost in time and effort waaay beyond that.
I don't know the actual compliance costs here - I know the cost of a UK lawyer just to review obligations and liabilities is probably going to be a few hundred quid, if not substantially more. I don't know of many non-professional, or FOSS sites that could afford that.
Your curt dismissal of this huge chunk of the internet saying they shouldn't be operating at all is mind boggling