They'd basically be using an expert to testify that doing something didn't require said expert. Like having an auto mechanic testify that changing your oil is dead simple.
I mean, it is probably possible to convincingly make that case, but it seems a bit tricky.
I'd think it would be more akin to getting an astrophysicist to testify that "F = ma" is something taught in an introductory physics class and isn't indicative of someone being an expert.