Even though you say we are the same, we are different, and not everyone is greedy in wanting profits. Some people could be wary of trying to make a profit. Only people trying to stay sane can reap those benefits without any desire to get greedy and want more money.
People can get greedy easily, but some people can still hold back their greed so as not to harm themselves. And it depends on how strong you can hold that greed so it doesn't grow big.
If you can, that's great. If you can't, that's a problem for you so you will follow what other people have done. The choice is yours

you can be sane, but in trading you have psychological problems at a certain period in your life