OK, let's set our sights a little lower here. Not because I believe there's a need to, but because popular opinion seems to be that the US Open will never be won by someone who wasn't already playing hours a week before puberty.
I'll postulate that. It may be the truth - I don't know how young today's top-ranked players started.
So, is it impossible for someone, say, to become an APA 7 if they're only a 5 in their early twenties? That has been tossed out into the discussion, and I'd like to differ with that opinion based on my own pitiful personal experience.
Although I've been playing off and on for 35 years, I never really got serious about it until I joined an APA league almost 5 years ago. The tactical side of things was a real eyeopener to me - at one point I was down to a SL2.

But my attitude was there, as it always is. You're going to have to beat me to beat me, because I'm not going to quit. Matches lost were an incentive. Not a learning experience, not a downer. An
incentive.
I chose to improve. By the time I was a 4, I was breaking and running 4-5 times a session. My position play didn't improve as quickly as my shots, but I steadily improved. During this period, nobody told me I wasn't going to be able become as good as I wanted to. I wouldn't have listened anyways. I don't do negativity.
I started this session as a new SL6 in both 8-ball and 9-ball. I celebrated by running three racks against a 7. I only lose to 6's these days when I make stupid mistakes, and I don't lose to lower-ranked players. It's pretty obvious to the rest of my team and the rest of my division that it's only a matter of time before I become a 7. Of course, they're not trying to discourage me. It wouldn't matter whether they tried to discourage me or not - I wouldn't listen. Nobody but myself will decide how good I'm going to be. I don't do negativity.
There are two main points to this diatribe of mine. Not for you, Danny, because your negativity is so pervading that it's obvious you'll never be one of the really good ones. You project to the world what you feel inside, and it's obvious to us that you're an unhappy man. I can't help you.
But I can help the Zims and the people like him who are just trying to get better every day. For you who are playing and improving for sheer love of the game: I'm absolutely no fount of talent. I played enough as a kid to be well aware of that. Where I am, I achieved through watching, learning and applying what I saw to my own game until
I found what worked for me. I didn't even get here by practicing - my job and family commitments keep me from playing any time except league nights. I've gone from a SL2 to a SL6 on maybe three hours of play a week.
You can get there. Just don't buy into the negativity.
I didn't join the APA until I was almost 40 years old. I intend to be a 7 before I'm 45. I've got two sessions to do it.
Anybody want to bet against me?