In this particular instance it’s conductors, but am sure it applies widely.
I’ve definitely been told as a nurse to smile - my male counterparts, not so much.
Has anyone ever told a male conductor to ‘smile more’? I doubt it
https://www.thetimes.com/article/113c70aa-1526-4915-9fda-e6a2747379fa?shareToken=f727b132f4039ed48b85ded218d9dcc8