yes, exactly. I considered it. It is very easy to do.
You would have no shortage of beta testers, and in the hobby / home space I would expect the market to be significant. Commercial hive operators, I'm less sure about how the economics would play out there.
There's at least one other pest that's large enough to be a good candidate for this approach - the wax moth.
There's plenty of other pests, but they're typically small and hitch a ride on bees, (eg varroa mite) so terminator gene really is our most hopeful solution for many of those.