It's actually the dangers of taking a risky profession.
Not only professional gambler, if you want to become a professional trader or run a business, it's the same, the odds are against you.
Well said there's nothing like a professional gambler because there is nothing professional in gambling, or is it the lost or win that makes you professional? You just need to take precautions while gambling, Manny play for fun while others play for life changing, and to me it should just be for fun because there is nothing good that is being guaranteed in gambling, if you're not addicted to gambling then I believe you're playing for fun but if you're addicted then you're being rooted in the danger that comes out of it and it can be really distrustive.
They do exist, there's always someone who're better than us and I believe there are small group of people who can make money through gambling. I've seen a gambler win a lot money, the proof is I can track the casino's bankroll because they offer bankroll investment, hence their bankroll are public.