To be fair to the dealer i spoke with, she was simply answering a question in an honest way. The opinions offered here are mine.
I just don't buy the reflection argument I'm afraid. If it were true, you wouldn't see newsreaders wearing glasses and and youtube would be full of unwatchable videos. Even if it were true, it would seem to be an error of the setup. Technology should be there to make our lives easier, not having us bending over backwards to accomodate it.
Of course any company can have rules but this one seems to cross over into dubious legal territory. Apart from anything else, it just doesn't make business sense to risk being dragged through european courts if someone was able to prove their health suffered as a result.
I think this could work with a few adjustments like showing machine was empty before displaying cards for the camera and putting them in the machine. The only thing is it would have to be repeated every time a table went offline. I guess you'd be putting a few shufflers out of a job though.