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.
On this your last paragraph I think otherwise though, I think that knowledge and self discipline should be prioritized, because if you can lose $10 very quickly what makes you think that you can't lose $100,000 very quickly if you don't know what you are doing, so wether the said fellow use higher leverage or not, it will be just a matter of time before he blows his or her account because knowledge and self discipline is key in the field.
So knowing what you are doing is one vital thing a trader must know before he can stands a chance of making it in the market.