I don't think any gambler has unlimited money. They might be whales, but they money have a limited amount. Gambling whales can also go bankrupt after a series of big losses, they're not gamblers with unlimited money.
Those are irresponsible whales who weren't inclined of how gambling works before they got to become whales. Although they'd love to spend time with the professionals in games like poker, there their problem begins, after losing for a while many amongst such whales rush back to slots for a while where the losses continues, not like they won't win, but because they assume the money won't finish, the accumulated high roll loss would emerge to a heartbreaking financial dispute.