Driving a car is one of the most complex mechanical and mental activities that one is likely to encounter in every day life.
But when I first started learning to drive at 17, I was actually behind the wheel in the very first lesson and driving to a busy part of London (the 'West End").
I was of course surprised at the time that I wasn't even given an overview of the car and controls, all the theory, etc.
Now I look back and think that it is a perfectly fine approach to teaching and learning.
It should never be either/or with regard to learning and sparring. They should go hand in hand. You need the pressure from sparring to test your body, mind and spirit. Skill cannot emerge in a vacuum.