I actually had a colleague who was a whale. Spent about $30k/yr on mobile games. He was staff level and made like $350k, single guy, so while it was hard for me to understand, it's also hard to say he was being duped or something. He just really liked the games, liked cosmetics, and liked to "support the devs".
These whales will be pissed if you ban them. Why should they be banned from their hobby because someone else can't be personally responsible?
The GP said "Demand proof of income or assets", so a 'whale' for whom $3000 a week is pocket change would still be free to squander it. There are already laws which require investors in startups to show $1M in assets but online sports books and casinos are largely free to prey on gambling addicts.
These companies post little notices like "Addicted to Gambling? Click here for help" but then relentlessly target and optimize dark patterns in their apps to target and trigger addicts. Search and you'll find documented evidence of shockingly abusive tactics.
Like, at least try to put effort to the comment to show you thought about it beyond the obvious propaganda of gambling companies. What, specifically, is the same? Why arent the differences important?
The apps know who the whales are. They make up 90% of their revenue. Ban them from taking money from whales, and the problem evaporates back to harmless $20 fun.
How to do this? Demand proof of income or assets and rent above $2000 in bets made in one year. Then audit these companies to ensure they are banning problem gamblers. If they are gambling or losing more than 5% of their net worth/income, that is a whale and they need to be play within their limits or get banned.
This is trivial to do, including at casinos. No one wants to do this because those companies have interests and that means their $100B+ scam industry is gone.