[gniewkoit]

And what are they practicing? What are they focusing on? Short game mostly? Putting? and how much?

Of the 6 hours a week one guys said he practised, 2 hours was on the full swing, and 4 hours would be on the short game pitching and chipping. Just because this worked for some TC doesn't mean something else wouldn't work for others.
You have dropped your HC to the point it is now by playing more and practising less, that would show its working for you no? what works for one, does not work for others.