The similarity is...not at all significant.

By your logic, going to a courthouse is like GOING TO PRISON!!! because you walk through a metal detector and might be searched. Or going to a major office building with security is like GOING TO PRISON!!! because you need ID, walk through a metal detector and might be searched. Or going to an embassy is like GOING TO PRISON!!!...

Have you ever actually visited a prison? Because they're so patently dissimilar that I think you'd be unlikely to make the comparison if so.