Give me a break. You mean to tell me that you believe hitting a million balls "with focus" means that this is enough to remedy, expunge all your flaws? If this is true, then most everyone who is not a champion or at least a pro who has hit a million balls must have an extremely vanishingly miniscule focus, or this adage is, like I say, BS. How many balls does one need to hit to adequately align the cue stick on the shot line, for instance? We're not talking rocket science here. It is because wanna be's can see but still can't recognize the nature of their particular flaws. Parallax, in this case, no one is telling them exactly how to spot and eliminate it as I did. If you are not observant enough to pick apart what you are seeing or have someone give you this knowledge you can't correct your problem. Practice makes perfect? Only if you know how to practice correcting your flaw. If you don't know the nature of your flaw no amount of "practice" will correct it. Not even hitting 1 million balls with focus. Using the technique I described earlier to eliminate parallax should remedy the problem almost over night if you remember to use it. (what is ROT?) Tell us, how many balls must be hit to eliminate parallax?
Who said 10,00 balls guarantees to expunge all flaws or grant you championship status?
For most guys 10,000 balls gets you to the highly proficient level and perhaps, for some savants, it does get you to an elite level. Regardless, the "focused" part is the part during which a player does analyze and adjust to improve play. It's the time you discover how things work on the table and the results generated by your approach to it. For most guys that are focused and attempting to improve the table and balls provide instant feedback on how that's coming along and they adjust accordingly.
As to parallax and dominant eye position there are endless resources that describe how to play around with that and I suppose there's also Geno. Bob and Dr. Dave have also put out video on ideal eye alignment and head height.
All you're doing with your inaccurate assumptions about 10,000 balls is setting up a straw man you can easily blow down.
Lou Figueroa
ROT = Rule of Thumb