I was reading the highly academic Moderate Drummer magazine the other day and came across this referenced cartoon. There is a lot of truth in it.
Having great technique ( 'chops' in drumming parlance) is wonderful but is useless unless you can play consistently and keep time with a band. Drummers who can keep time are generally hired for the gig!
I have seen something similar play out in other spheres. I have known many knowledgeable and book smart physicians who are less than adept at applying the knowledge at the bedside. I have also known many footballers (soccer players) with great skill and technique who cannot play a 90 minute match with a team.
Skill, technique and knowledge are absolutely necessary, yet not sufficient. Application is key.
If you have both then you are the real deal.
