Agreed. I learned to play drums on my own, and for years just taught myself to play along to records, and in bands. However, it wasn't until I started taking lessons that my progress was exponential. It's such an incredible and invaluable investment on one's self-development!My experience was self-taught for twenty years or so, and then took lessons. I learned more and improved more as a player in that year than I did the first twenty.
As for fundamentals, I recently hired an excellent jazz drummer and educator, and at least half of the lesson, if not the whole hour, is him watching me play rolls and flams. I can rightly claim 40+ years of experience, and this is what he knows I need: rolls, flams, diddles. I wish I had realized long ago that I didn't need all the instructional DVDs and book-of-the-month to get that drumming wow factor. I just needed a qualified teacher to put me through the rudimental paces.