I'm aware 10,000 workers is part hyperbole and mostly not coders more like HR, managing, translations and marketing but I'm pretty sure you could kill off 100 people without hurting the product given how it stands so even if the fuzzer did nothing it could replace 100 people.

But it could test UI both voice and graphical, test inputs, test codebase, test load balancing, find security issues, it could help with marketing and translations. I also think a fuzzer could beat a manager at doing their job, but that's probably cynicism. You'd be better using the fuzzer at getting useless managers re-assigned.