The 10k hour theory is around becoming a master at a skill. That was referencing Judy's statement earlier in the thread about how some of the guitarists she admires probably played for 20 years (and >10k hours) to get where she knew who they were.
I agree, I'm just having fun. You won't become Christopher Parkening or Joe Satriani in a few weeks with a few chords. Angus Young, OTOH,....
You, too, can be a rock star with just G, A, and D!