First, the quesiton is not what it takes to be a world-beating champion, but what it takes to be a great player. By my standards, there are tens of thousand of great players.
What's the path to being a great player?
By observation, these are the eight rungs of the ladder on the way to being a great player.
1) you know how to hit the cue ball in the intended direction with relative consistency
2) knowing how to pocket balls with reasonable conaistency but with little command of position play
3) knowing how to pocket balls with reasonable consistency and having a reasonable command of posiiton play using follow, stop and draw, without english
4) knowing how to pocket balls with reasonable consistency and having a reasonable command of follow, stop and draw, with center ball and outside english. having decent but not exceptional speed control and a rudimentry command of defensive and tactical play
5) knowing how to pocket balls with reasonable consistency and having a reasonable command of follow, stop and draw, with center ball and outside english. having solid speed control and a rudimentary command of defensive and tactical play
6) knowing how to pocket balls with reasonable consistency and having a reasonable command of follow, stop, stun and draw, with center ball, inside and outside english. having solid speed control and a solid command of defensive and tactical play
7) knowing how to pocket balls with excellent consistency and having a strong command of follow, stop, stun and draw, with center ball, inside and outside english. having solid speed control and a solid command of defensive and tactical play.
8) adding a strong pre-shot routine and mental toughness to all your developed skills, developing a strong competitive pedigree
In my expereince, few players ever progress beyong the fifth rung of my ladder, but the great ones are the select few who get all the way to the eighth rung of the ladder. Obviously, instruction, practice and competition figure prominently if you hope to climb the ladder of pool excellence.
Stu, we have a very different definition of "great" player. In my opinion there are maybe a few dozen great players alive today, if that. Certainly not thousands.