That mindset should be adopted on something where you have a big possibility to make money, not gambling where house is high likely will win.
Let’s say you stick to your gambling limit and you don’t quit as long as you still have your budget, that’s still within the safe zone and it still fits the definition. You’re not quitting because you still have money to play with, and that doesn’t mean you’ve lost control.
Well that's what a responsible gambler or healthy gambler is, if most gamblers are like that, we will not hear many people talk bad about gambling.
The @OP treat like the world is just either black and white, like if you do this, you're right and vice versa. Not quitting gambling has no guarantee you will win, not to mention the definition of "win" may vary.