I think that all of: the concept of x-ism, a text that may or may not contain x-ism, the scope of a text, and the interpretation of that text by a reader, are all socially defined subjective things, so that nobody can ever say 'this text is x' they can only ever say 'I think this text is x'.

I think the argument comes from misunderstanding that difference.

And the 'I think' encompasses a huge divergence of personal experience and reasoning because people are very different from one another. So there is no objective right or wrong answer, just as there is no right or wrong list of experiences that everyone must have or brain chemistry that dictates how they reason. There is only the individual personal response, and cumulatively the non-democratically measured majority of responses that create social mores. How we choose to fit ourselves into the social mores is up to us.