Us testers have been dealing with that crap forever. Every non-tester thinks they know how a professional tester should work, and imagines our work is just writing test cases.
There are multiple stories of public facing applications with Microsoft active directory as the source of user accounts that speak to the worst examples of this.
I was involved in such an attempt but it never got off the ground.
If you haven't faced or witnessed it, it is a moment that you will not forget, and then over time little by little, realize it might not be so uncommon.
The result was a piece of shit, but it was his piece of shit and he loved it.