You are not a professional unless you gamble professionally for a living like poker players. That is the only thing. You can act professionally, but that is something else and you would just be considered a disciplined amateur. To act professionally you need to check all the boxes like discipline, strategy, bankroll management and such things. If you miss on any of them then you aren't really good at this.
Is been responsible with gambling all it takes to be a professional gambler or someone needs to win in the process many times already to be considered a professional gambler?
I have always win less, no reason to lie but I get curious when I see gambling related posts online about people pointing to some gamblers calling them professional and the only vital point of this all is because they won many times in their own way.
What is a been qualified as a professional gambler in your own world? The winning part or the responsible part of trying to avoid addiction is all.
It has nothing to do about how often you win. It is about professional behavior or gambling as a job.