Not everything on a sign is a name. Many signs are descriptive, rather than displays of names. I think “Toilet” counts as such. No one would ever say: “I was at Toilet.” No, people say: “I was at the toilet.” Toilet is a noun, not a name.
So name=Toilet on amenity=toilets is pollution of the map and should be removed.
I thought that would be a simple thing to edit, but the Germans got me blocked for fixing that: Automatisierter/Mechanischer Edit... Bolzplatz: name->description. Some of them have difficulties with distinguishing names and nouns.