You’d have no idea what, “if”, “then”, “else”, “while”, “for”, etc mean. All you’d know is their symbolic meaning in code.
Means the same thing as, “That happens”
What happened when motorized farm equipment eliminated much of the manual labor in food production - did the world end? No, the labor pool adapted (and the family unit did too). What happened as more and more machines entered the work place in the form of your desktop computer, did the world end? No, the labor pool adapted. And so it goes from industry to industry as technology improves.
There are entire industries today that did not exist even 50 years ago. Imagine the industries we’ll see in another 50 years. They’re going to need employees too.