Testing is a lot easier than creating the original program
It took Einstein to come up with the Theory of Relativity. But plenty of ordinary physicists have devised tests for this theory and have tested it thoroughly.
The same is true for creating a computer program. Machine learning can create a very complicated program. But you, as a human, can create all kinds of tests for it to determine how it will perform in various circumstances and perhaps add to it some human-written code to correct its flaws.
There is no reason why computer programs have to be either completely done by machine learning or written by humans. The best result is when you have a combination of both.
Biting the hand that feeds IT
