

Washroom promotes the incorrect assumption that people wash their hands. Any time spent in a public latrine will show this to be inaccurate.
Water closet, on the other hand, tells you exactly what to expect. Cramped, likely too dark or too bright, and riddled with moisture of both expected and occult origin.
Water closet is the way.
Things are hard out there, and that makes people feel like finding hills to die on. The less stressful life is, the better the discourse, usually.