I've played guitar for 30 years. Less so the last 5 years and the reason why is your answer.
It comes down to inspiration. There is absolutely no drive toward musicianship like "oh that's awesome, I wish I could produce that sound on that thing."
Find music that inspires and challenges, and the rest will come by its own nature.
Granted there's a year or two of learning to read and play properly but truly, everyone has their own path there. All that really matters is inspiration. If I'm inspired, I'm playing.