Good read.
When I was younger I contemplated either being a fighter or working a comfortable middle class office job.
I chose the latter and that it what I am doing now.
You can still be fighter and have a regular job but I think with sports, music, making Youtube videos, fighting etc it is only a tiny tiny fraction of the people who does it, who will be good enough to make a living from it.
Think of it this way. There are 7.4 billion people in the world ig you a 1 in million basketball player, you are 1 in 7,400 still probably not even good enough to be in the NBA.
Another less dramatic example would be football(Soccer) here in Australia there are say 300 professional football players(Im being generous here) and most of them are not really making a lot of money.
Our population is 25million, so to be professional you need to be in the top 0.012% of the population to make say AU$50k-$150k/year in which would put you in the middle class of Australian society.
Then if you get injured your career is over.
My final example whould be the USA and MMA. The US population is say 325 million, let's say 1,000 of these people are good enough to be professional MMA fighters for orgs like UFC, Bellator, WSOF, Invicta and whatnot.
To be one of those 1,000 people you need to be 1 in 325,000
TLDR Reason/Summary: Becoming a professional fighter, sportsperson, artist, musician, Social Media content creator is highly unlikeable.
So you if you like that stuff do it as a hobby and if you are good/smart enough quit your daily job and do what you love professionally.