"Staying in a hotel with a romantic partner and/or family" is at least as primary a use case for hotels as "staying in a hotel with a platonic friend" and is still a scenario where you want a door but is NOT a scenario where "just get separate rooms" is a logical conclusion. "Get the hell out of that hotel and complain about it to everyone you know," on the other hand, is.
The much more specific way to target platonic buddies/coworkers from sharing a room would be eliminating rooms with two beds since the "couple" scenario would generally be perfectly happy with that still.
"Staying in a hotel with a romantic partner and/or family" is at least as primary a use case for hotels as "staying in a hotel with a platonic friend" and is still a scenario where you want a door but is NOT a scenario where "just get separate rooms" is a logical conclusion. "Get the hell out of that hotel and complain about it to everyone you know," on the other hand, is.
The much more specific way to target platonic buddies/coworkers from sharing a room would be eliminating rooms with two beds since the "couple" scenario would generally be perfectly happy with that still.