The Thinking Behind The Tweet

Malcolm Gladwell [in his book, 'Outliers'] taught us, regardless of Talent, people need to spend at least 10,000 hours to become performing masters.

I think - if you are not paid to be a performing master then you are performing a hobby [not work].

I think - if you lack discipline then you won't even be good at hobbying.

And, I think - if you are not good at stuff then you do not enjoy it...and that's not a good way to spend your time.