The level of commitment I list as minimum primarily an indication of how confident I am in making predictions regarding the success of individuals at 5 std deviations below the norm. If someone else has more familiarity with that class of people they would be able to specify a more realistic picture. I gave my criteria to demonstrate that such a claim is, in fact, falsifiable.

It is not quite on the level of 'anyone can become a concert pianist if they just learned to play the piano'

It is even more like: 'anyone can become a concert pianist if they just spent 3 hours a day for 3 years practicing the piano'. (Except the piano thing is way harder.)

To add some perspective and as a belated reply to CronoDAS I would expect that anyone who could not get a relationship after spending 3 hours a day for 3 years trying and practicing would not be able to manage a full time job anyway.