“But humans aren't great at writing software either”.
Buddy, today I've wired up together two computers with a 40 year gap between them. In a little over a generation these things evolved from basic, hard to use, fragile contraptions, to a global network of insanely powerful machines that never crash, can do thousands of calculations literally at the same time, and billions of them a second, and the entire world runs on this infrastructure.
I think humans know how to do this.