I know 100s of people who've been to vegas and had a good time gambling, not one of them would say "I wish I'd never gambled in the first place". I personally know zero people who gambled so much they regret it. I'm not denying those people exist, but I suspect if you ask everyone, a very small percent have had a strong negative experience

Yes it's a very small % of the population, but it's actually a significant percent of the earnings of these platforms.

Just for illustration -- when I worked at Zynga they'd sell in-game purchases for over $10k USD for virtual items because there were people who just couldn't help themselves, and those "whales" were actually the bulk of the profit of the company.

That's why these platforms should have mandatory sane limits that can only be exempted with special circumstances.