Not sure whether I was clear enough, but I understand both sides of the argument. It is a very specific technical term and the zero-knowledge proof Wikipedia article states that zero-knowledge is the name of one of three properties that zero-knowledge proof have to satisfy, on the other hand it is also a nice, catchy and probably understandable marketing term if you want to express that you know (almost) nothing about the users' data.

Developer me would certainly prefer technical accuracy but we all know that users certainly could not care less what is the technically correct name for the thing. So I don't care at all whether they call it zero-knowledge or not, they are not trying to trick anybody into believing they are doing zero-knowledge stuff in the cryptographic sense. I actually like zero-trust but I can see how this could easily be interpreted in the wrong way, should or must not be trusted instead of need not be trusted.