Ten finger typists can do more work in fewer hours, giving them extra time to devote to other tasks. Typing with 10 fingers is a skill like riding a bicycle - the more you do, the faster and better you get. Typing with ten fingers is not merely five times better. It is better because you type words and phrases sub-consciously. Like reading, you get the story without reading each letter.
Touch typing is the real-time transfer of human ideas to the computer.
It is thought processing, which is much more than word processing. You will recover the learning time in a few weeks of the rest of your life.