Sheesh, the lock chat got metaconvoluted as fuck.
I can only say 2 things about it. The first one is
And the second is the reason why one would want a lock in the showers is essentially for roleplay purposes. The showers are "communal", but that doesn't stop the girls from closing the door when they're using it and getting angry when you enter without permision. Meaning the idea of privacy is there, but the lock got removed because the dev might have made the mistake of thinking that the roleplay aspect isn't as valuable for his game and took a little piece of it out just because it was giving him a pain in the ass when programing some shit.
EDIT: Careful with the ban ogres; they can come at any moment and Thanosnap the entire conversation if they feel you got too carried away with not talking about mainly the game. Chance I'll use to shamelessly promote the Off-Topic rebellious chat a noble pal of us opened up in the name of shitposting freedom:
https://f95zone.to/threads/jubes-boobs-everything-off-topic.144228/post-9927186