Earlier quoted context omitted.
How does this have anything to do with 'public health'? And almost any regulation gives a (relative) advantage to the people who can afford the lawyers and bureaucrats to furnish the documentation to show that they are in compliance.
The absence of a door strikes some people's sensibilities as mingling the capital-C Clean with the capital-U Unclean. Which, as I think you're hinting, is largely distinct from anybody's actual health
I'm all in favour of opaque bathroom doors (and none of these stupid vertical slits American have between their public bathroom doors and the walls). But I wouldn't want to pretend it's about hygiene or health.