Being a professional player is always difficult, let's consider different aspects, what can happen at a cerebral level to a professional player is the complete dedication to the game which causes the person to be constantly under challenge, this is not good for health and risks causing permanent damage to the person's character, then it also involves the emotional sphere, usually those who play always remain frozen, never an emotion
You are right, being professional is not easy and not achievable by a very large percent of all the gamblers, if it was simple like some people think, I should have become a professional by now because of how dedicated I was when I newly started gambling and even the years after, I was still fully dedicated and trying to employ different methods in order to win but yet I didn't win like a professional. If being professional is only regarded in the aspect of being responsible, then I would say i'm one but it's not measured like that but by winning.