When you write it like that it sounds sinister, but the reason that real gambling is dangerous is because you do sometimes get your money back, and it’s possible to convince yourself you still have a chance to come out ahead. Knowing that you’re spending money without ever having a chance to get it back means you’re not gambling, you’re making a purchase.
You could say the same about buying food - no matter how lucky or skilled the player is, the house will always keep 100% of the money they spend. Because it’s not gambling.