First of all, remember one thing is that never learn from such kind of people who failed in their life even after following their passion because it’s a mistake of them, not yours.
It’s better to learn and inspire from your idol who have work harder than those and also who are more talented than those.
There can be many reasons for their failure.
-They have not worked so hard
-Their mindset is not good
-They have given up
And much more reason can be their
Remember being only good is not enough you have to be great, then only you can be successful in a particular field you like.
“GOOD IS THE ENEMY OF GREAT”
Everyone can be good but everyone can’t be great and market demands great.