Theory without experience is useless.

A year ago, I tried reading a poker theory book around when I first started playing. It was boring and incomprehensible. Fast forward a year of bi-weekly games and I devoured the same book, finding it fascinating and applicable.

Theory needs experience to attach itself to. You can't patch holes where no structure exists. You need confusing moments where you wonder "What should I do here?" to appreciate what theory teaches. That's why a beginner shouldn't read a book on how to shoot a basketball or ride a bike, but an amateur might benefit.