Learning from past mistakes is how humanity grows as well, that's the thing that allows us to grow as much as possible. I can tell you two things that history has proven so far
This is the reason i always recommend every new traders to start trading with real money and don't follow any youtuber or telegram channel. As a newbie one can make many mistakes but these mistake will teach many skills and every mistake will increase your confident and next time you will be able to trade free of tention and as OP mentioned The more you trade your emotion will be controlled.
Depending on how well a person is doing financially, maybe trading in a demo account until gathering experience may be a better option. I saw many traders get wiped out early on in the pandemic and they stopped trading because they couldn't afford to lose the amounts of money that they lost, and felt "cheated."
People are wired to work ad gain income from their work, losing large amounts of money can break people down very early on and then they never gain the experience necessary to be profitable with their trading.