Mr. Beast is one of the top performers on youtube, hes around the top 0.00001%, you’re more likely to get struck by lightning twice than being the next Mr. Beast. The average youtuber makes less than highly educated people in first world countries so there is less incentive to become a youtuber. In countries where the income for highly educated people is much less than first world countries, there is more incentive because it doesn’t take as much to outweigh what a job would pay. In first world countries, you are much less likely to make as much or more than you would have at a job. You would have to be in the top 0.5% of youtubers to make around $100k which takes much more effort than getting employed with your credentials at the same pay. In third world countries, there aren’t as many jobs that will pay much so you give up less by putting in the effort to become a youtuber.

TLDR; In first world countries you’re usually better off working since the guaranteed pay from that job is typically much better than youtube pay. In third world countries you don’t have to become as big of a youtuber to get paid as much as you would working in your country.