The ability to read faster with comprehension is a learned skill that can be developed through practice and proper training.
Think of it as like riding a bike.
Riding a bike requires a minimum speed. When speed is too low the task becomes difficult and risky. The same applies to reading. Poor reading is like a steep and uncomfortable excursion. As a consequence slow readers rarely read for leisure, entering a vicious circle of slow and seldom reading. This leads to regression that in turn further slows reading and decreases anticipation.