Oh, no particular reason. They can always get the computer to do it for them. They can get a calculator to do their math for them. They can buy all their books on audio tapes. Most computers will now read text aloud, so you don't even need to know how to read. We should teach kids how to get something or someone else to do everything for them. I don't know why we should bother teaching them anything else.
My husband's computer writes for him at work, too. And he even uses a calculator. Doesn't keep him from THINKING.