It's a great experiment, though I personally believe that anyone with minimum physical abilities and coordination doesn't need that many hours to become really good at golf.
As stated before, golf is a sport that does not require extraordinary physical abilities to become really good at.
But apart from the minimum physical requirements, you also need to have the right mindset and the right way of training (not to mention a whole lot of time)
As a beginning golfer, I just went from playing 9-holes in an average of 65 strokes, to an average of 47 strokes in just 2 weeks of intensive practice (3 hours a day),
and the end of the accelerated progress is not yet in sight.
I expect to go further down to under 41 in the next 14 days. That would mean a 1-digit handicap, coming from 58 handicap, in just 4 weeks!
Why am I so sure about that and why am I improving so fast?
Because I have a well organised and focused way of practicing.
I don't waste a lot of time with things I know I'm sufficiently good at already, or that are not really important to lose strokes.
Instead, I analyze my game to determine the exact problems that are keeping me from good scores, and focus on them during my practice.
i.e: - you don't need 300 yard drives to have low scores, but you do need to hit the fairway consistently in order to prepare for pars and birdies.
- if you're making 18 puts per round (9-holes), but are constantly shanking your irons, you should figure out why you are shanking and get rid of it,
instead of spending 1 hour per day or more on putting or trying to drive it 300 yards!
- make sure you have a standard shot for every club and know the corresponding distance for that shot. Only that way, you can make a decent approach shot to the green, instead of
constantly coming short or shooting over, which will result in unnecessary extra strokes.