You are very right about what you posted, most traders do not have the money but they are trading with the little amount of money that they have and they become impatient and lose all the money continuously, they use high leverage and lose. I totally agree with you.
But for those that have $100000 to trade, they suppose to be making money than $100 daily even if they are patience. But they should not use leverage and they should not trade with the money at once.
Yeah the op is quote right. a small profit does not make anyone happy whether he is trading in a very small range or with a large amount. That is why when a rich person trades with an amount of more than $10k and makes a profit of $50-100 then it is fair for him and at that time he is happy for it but when someone starts trading with $100-$200 then how much profit can he expect it should be $1-$2 per day. But even in that case he is not happy until he makes a profit of $20-$50. And because of this they gradually move towards leverage trading and later they lose their trading capital there. That is why the percentage of successful trading of poor people is much less than that of rich people.