There might be just a shadow of truth in that. Computers can do most of the work and get the correct answers nearly all of the time.
Where you really need the math is when computers don't get the right answer. Unless you know what is happening you won't even recognize a wrong answer, until it's too late at least.
As a now old time engineer, I know this. You should know the answer you expect before you run a program. Very view can do this anymore. I spent a career catching mistakes with calculations in my head.