Not all people have the luxury of being staked to trade other peoples money at a true "prop firm". Many people started trading their own money learning to trade and also became successful trading in the pits and risked everything. Whether it was 10k or 50k.
If you have no college degree and are trying to make it from nothing, no money and make it trading. you have to come from nothing and risk you own money because your chances of getting a job at a "prop firm" are slim.
"Arcade" trading allows people to risk a certain amount in order to receive both leverage and direct access just like the people in the pits used to do when they went in there with borrowed or saved money.. And yes its true you can walk in with 50k and leave with nothing. Yes its true the pits died down and they traded the order flow. But the principal is in taking a chance to become a trader and come from a deposit and make a living
And fyi people have learned to trade either at arcades, or on their own too and have become successful at day-trading