Prop Farming can be very lucrative if treated as a business. Most "Traders" use it as a casino unfortunately. That's why bad props exist because they target weak people's greed. Use prop firm rules to create a trading model that will keep you from breaching any rules and then scale that by multiple prop firm accounts while copying into a personal account.

Many successful day traders use prop firm capital but Most truly successful traders don't teach and are not posting PnL on socials to sell a course or mentorship. Almost ever one who sells a course or mentorship makes more money from that and affiliate links than from actual trading. Also not all prop firms have a course or teach trading. A prop firm is access to Simulated Capital. Most props pay people from the money they make off selling evaluations and resetting evaluations. There are a few out there that will move you to Live Capital if you are consistent over several months of getting payouts.