Nonsense. I am proposing QA teams and tools in addition to all of the other tools that a development team uses. If you, as a developer, are having a hard time testing something, ask QA how they would test it. Make sure they will be able to test it.

If after that interaction (or before) there is an easy way to construct your model such that this can be fully automated, do so. But, essentially, make sure you are working with QA.

This would be akin to a football team ignoring the special teams and not considering them in any decisions. Sure, if you have a perfect offence this will work. Most of us do not.

Edit: So, not sure why I began with "nonsense." Apologies for the tone on that.