Because it's not a job. It's a skill. My wife works with doctors that were told "You don't need to learn how to type, you'll have a secretary to do that". Years ago that's how it worked. Now everyone is their own 'keyboardist'.
When I graduated highschool it was important to put that we were proficient in "Microsoft Word and Excel". I dropped that from my resume years ago because it's just assumed now.
Computer Scientists / Software Engineers designing good code and architectures will still exist. But your average lay person should be able to whip up a dumb script in Python to do something. I'm just a dumb mechanical engineer. I'm sure most of my code is terrible, violates some cardinal rules. But it works. When I need to find all of the data files where X event occurred I just kick the script off at the end of the day and come back to the results.
Accounting and some other industries are 20-30 years behind where Engineering is. After listening to what my Sister-in-law does at work I could replace 2-3 of her co-workers with a half assed python script.
In 20 years "Programming" will be up there with where "keyboarding" is now.