I'd have to agree that a 1000 hours of practice on a few chords is not the best way to learn musicality. My parents spent a fortune on private guitar tutoring

I'd have to agree that a 1000 hours of practice on a few chords is not the best way to learn musicality. My parents spent a fortune on private guitar tutoring to modest effect and I'd say in my case the single biggest thing was freestyle practice while listening to the progression and trying to react to the teacher. So practice indeed, but one where listening and technique are both part of the exercise at the same time. Some theory (for the mathematically inclined) did help for me to understand progressions. Things like landing on the right note are instrumental for the audience and based in theory.