I think the point of the invisible bridge was that you had to really believe it existed because only then you would later activate it. (I really have the feeling the writers were inspired by a movie or something…)

But I agree: The whole logic of the place was a free pass for the writers to do what they wanted. So maybe it’s better not to look too close.

Also: Noone not even mentioning the weird background effects (they were obviously added in post so neither the writers nor the actors had the opportunity to really react to it) was big miss for me. It would have been the first thing I would try to scan with my boxy tricorder…