I agree with your general assessment. I think one sane area for regulation is tracking large losers and having mechanisms to help addicts create self-enforcement (banning themselves effectively).

However, I think the mobile gaming industry is probably just as responsible in this way. Clash of clans has people spending 50k+ per year (outliers of course) on the game and also tries to trigger a similar gambling-style positive feeling. They also are some of the most effective mobile advertisers tracking individual customers all over the internet. Do you think these "whales" get enough control on how they're targeted by companies?