I don't think everyone looses, but there is a large percentage probably do. But professional Poker players do exist, so there is a small percent that can make it work.
Sadly I'm one of he larger population that has only lost money.

Yes it is true but professional players too can lose, doesnt mean that he or she is pro player they never lose it. They just know how to control their income and outcome from this gambling. Most gambling is still depends on your luck