You have picked a wrong crowd. That is on you. Go talk to surgeons, doctors, pharma researchers - very decent people, who made/make serious money.
Who paid their rent and university fees while they were studying for 10 years to become a doctor?
Where are you?
It can be 3 year Bachelors degree + 4 years M.D. (seven years total) with the opportunity to earn money as a resident or rural practitioner while completing the M.D.
https://study.unimelb.edu.au/find/pathways/doctor/
If your grades are good you can be accepted and either pay back fees when earning or ride through on a scholarship if good enough to qualify.
There are people willing to work long hours for little return with the prospect of a better job after an apprenticeship.
Medical degrees are offered globally, not all locations only allow the children of privilege to become doctors.
Who paid? Their parents. Grocers, school teachers, plumbers... also lawyers of course, but in Europe you don't need to have rich parents to study medicine.
There are such well known things as student loans, working whilst studying (some very successful doctors have talked about having to bus tables whilst studying)
It's amazing how pervasive this mentality is. The premise of buying something for one amount of money, processing it and then selling it for more is totally alien to people in this mode of thinking. In their mind, a man could not possibly make money by buying uncooked hotdogs, cooking them and selling them for more. No, he must be stealing the hotdogs, or using fake hotdogs, or stealing the wages of his employees, or some other scheme. Anything other than simple honest business, which they feel sure cannot exist.
Unfortunately you seem to be thinking in this mode, since evidently you believe that criminal activity is the only way somebody could get through medical school.
Privilege is often the product of unethical machinations that happen behind the scenes or happened behind the scenes at some point in the past. Once you understand that value creation and value extraction are two very different concepts and that only the latter is rewarded AT ALL, you start to understand how we got to where we are today. It's not value creators who are rewarded. Over long periods of time, our system almost completely dispossesses value creators for the benefit of value extractors.
Money, in its current form, is the root of all evil. In a highly competitive global environment, you cannot win without cheating. That's a probabilistic fact because if there are 10K intelligent people competing in the same area (which is very common in global markets), the probability that maybe 100 of them will be cheaters is very high and the cheaters have a huge competitive edge over the non-cheaters, hence the winner in a winner-takes-all market is much more likely to be a cheater.
Good white-hat hacking (tax|legal|financial|computer) also requires a criminal mind I believe!!! Bending or twisting rules and knowing which rules to break! Criminality is dependent on your context. Risk/reward is a key feature of economics.
My personal word for a drug-dealer is entrepreneur.