To be honest, such people dont last long either. They will get washed away while trying to make more and more and will be a small speck of dust in the trading timeline. Those who survive this game are the ones who are diligent and have controlled their emotions to not be greedy but be frugal.
The gambling mindset should be changed for this to happen. But there will always be some newbie willing to take the risk and become food for the whales.
I agree with you, the market tends to wash out traders that don't have the right mindset. Being controlled by emotions makes usually bad investment decisions. We can't listen to our stomach when to buy and when to sell. Greed is one of the worst emotions a trader can have, because it lets us focus mostly on returns and how to maximise them. But once we focus only on returns we tend to forget about the risks we are taking to achieve that returns. The chances of blowing becomes a big issue for too greedy people, similar to playing in casino and never stopping after a big win, until all the money is gone again. It's much easier to lose money than to earn it, that is why a good investment portfolio should focus more on the risk than on making the maximum possible returns.