But you can validate the business rules with the people that make them: the business or your users?

I get some companies do things pretty fucking backwards and QA as a separate function is harmful, pointless and should be abandoned.

However, I don’t see how anyone from QA is going to physically stop your from testing and validating your code. As a dev, you could be more proactive in understanding what you’re building, why you’re building it, and how to make sure it works and it does what your stakeholders/users need it to do.

If you don’t, then refer to OP’s post.