It makes sense for a career minded person to work with a prop firm.
Think about the business model: the prop firm assumes more risk (ie capital), so they are vested in the successful trader and promoting successful trading. Their margin is more dependent on profitable trading. They assume risk, so they also deserve a greater share of the profits. And the capital investment into successful trading is greater as well.
On the other hand, the retail firm has much less/no risk, and it dependent on fees/commissions for profit. They just need seats filled and accounts churned to make money. Profitable trading is less of a percentage of margin in retail. It is a bonus, not a priority.
And the difference is proven by the innumerable horror stories posted here and other sites about shady Retail firms, refusing to return capital, training schemes, not paying traders on time, changing llcs, etc ... All retail firms are not shady, but they are rampant.
I guess if one is a seasoned trader, with a successful trading style and track record and a decent knot of cash, they might benefit from retail (higher payout), but I bet even they have to make rigid demands with these retail firms.
I mean degenerate gamblers are everywhere, so if you are independently wealthy and just want to sit down and mash keys for fun, and have money to burn, or are an established trader, retail is the way to go. Just have a good lawyer.
But for many, I feel prop trading is the best path to make trading a professional career.
Keep reading posts and you can make your own judgments.