What matters in the end is working code, not the tool that made it. I propose that developers buy their own tools and be held responsible for installing, maintaining, and dealing with them just like auto mechanics do.
You wouldn't write a method without a test, why would you design a user interface without a test? I believe usability is a critical component in agile software development. Had I made usability part of my software development, I know that dating program would have changed my life.