If money is unlimited, many people might think why gamble anymore when they have unlimited funds.
But I think there's nothing wrong with spending a small amount of money just for fun, and the thrill of gambling is there. Even with plenty of money, you can still feel the thrill of winning big.
The problem is that truly big wins are impossible with small deposit amounts. Of course, everyone can say that some slots offer a 50,000x multiplier, and that would be a significant amount even with a $0.2 bet, but the thing is, when people talk about big wins, they imagine hundreds of thousands or even millions. And for that, you need to play big, making decent-sized bets.