PS: I totally agree that educated hands are vital - and that uneducated hands can nullify everything. But I don't regard educated hands as sufficient in this regard.
There are a lot of 5-15 handicappers I know who have played for many years, who know how to produce a decent score but who doesn't have anything like a good stroke. I think these typoe of golfers show how far most people can get with educated hands and without a good stroke pattern.