Playing online poker for one’s primary income makes just as much sense as pooping your way rich.
Doyle Brunson would seem to make that a silly statement. For most people however it is surely true. Impulse control among these guys is pretty lacking. Mike Matusow is a prime example, he has showed the ability to make money in poker then lose it all on sports betting. There are many many people who regularly make money in poker, I am not one of them but used to enjoy the game.
Look at the streaming poker games from The Bike Club and you will see some cash player that do well and some even retire with money, most don't. The really big games are in Macao where all the high rollers now play. Triton poker is another high roller club.