The question was 'is it realistic?'. The answer is no.
This isn't being negative. This is simply answering the question.
Is it theoretically possible? Yes. So is winning the lottery. I think the odds are comparable. Meaning they are so long that to six significant figures the odds of success don't really change whether you try or not.
The notion that if you put your mind to it and don't let anything get in your way you can do whatever you set your sights on, that isn't quite accurate. That is simply the price of admission to get into the top few thousand. There are literally thousands of players that gave their life to follow this dream thinking that if they simply sold their soul and played their hearts out every day for many years good things would happen. Unfortunately for all but the top 10 they didn't, and even some of those 10 have had a very dicey path at best.
I didn't believe this either when I was young. From the time I was 13 until I was 19 I practiced every day, 8, 10, maybe 12 or 14 hours a day for 6 years. I drew pictures of pool patterns in my school notebook, cut class at 12PM when the pool hall opened and played until 10PM, then went home and practiced shots until after midnight. I watched videos and then dreamed of pool. Easter. Christmas. New Years. I was playing pool, because I wanted to prove I wanted it more than anyone in the world. I wanted to be the #1 player of all time. Saturday nights I didn't go to the movies, I was doing drills. I practiced hard shots for hours, until I'd made them 100 times, then if I caught myself just going through the motions after I reached 93 I'd get mad at myself saying "you're not doing this to get to 100, you're doing this to become the greatest in the world, you aren't going to get there with this half a$$ crap, just for that you're doing another 25!". Older players around me told me that they too had been young and hungry once, and I laughed, no one had EVER been as hungry as I was. I pushed and pushed and pushed, well beyond pain, I steered INTO pain because I felt that pain was equal to improvement, the more pain I went through the better I'd get, and I was going to lose my competition because no one in the world wanted it as much as me, no one would be willing to go through the pain I had gone through. So I steered into the ninth circle of hell, and stayed there for YEARS, every time I whimpered I got angry and fired up my drive again, and whipped myself harder.
This doesn't even begin to describe what I went through for 6 years. Practice, gambling, tournaments, study, more practice. THEN- in my 20s I played better players, pro tournaments, regional tournaments, and put in another many years practicing.
The results? I'm a good regional player. I've cashed in 4/5 pro tournaments I've played, with a 17th place in the US Open as my high water mark, a few memorable wins over world champs, and a very strong regional performance.
I know, I know. Just because I couldn't do it doesn't mean someone else can't. Again, I'm not saying it's impossible. I'll just put it this way...I'll give you 5 years and bet against it, I'll be my house, my car, my cues, and everything I can borrow, and put it up against your $10.
That all said, it was a fun ride. I still love to play, it's a heck of a game and I enjoy the hard work and the road. I don't have any regrets. I just think if you go down this road it better be about the journey not the destination, because the road doesn't really lead anywhere.