I would argue that if someone can't safely operate a vehicle without this then maybe they shouldn't have a license
What exactly are you arguing for? Changes to the driving test to detect how someone reacts to distractions?
If locks are to keep honest men honest, then driving monitoring cameras are to keep attentive drivers attentive.
In this scenario anyone who "should" have their license would never trigger this warning in the first place so it wouldn't be an issue.