Do you pay to play? Do you ever win anything?
If they are free tournaments, then no harm no foul. When you said MLG I naturally assumed you were one of the "sponsored teams" that goes around to tournaments with $1000 entry fee's and $10,000 prizes, which, with the amount of gamers that go to those, makes it very unrealistic for a career path.
OF CORUSE NOT I would never pay 1,000 dollars for a tourney. I migth pay 5 dollars to get into one that has like a 200 dollar cash prize but never that much money. And I cant get a job yet