I find these takes kinda insulting because they directly dismiss as false direct personal experience of a lot of us. I have experienced visualisation.

I know the vast chasm between the two states from direct first hand experience.

So do many others.

This is partly why only aphantasics argue for the "it is only semantics" explanation. For anyone else, this explanation makes no sense, because they have at least one vivid example showing otherwise. Only if you have no vivid visual experiences does this argument have any appeal.

Also the well-documented cases of acquired aphantasia are especially troubling for the skeptical "semantic disagreement" cases, given that acquired aphantasia is entirely within-person.

Yeah, that is my experience too. I consider myself to have aphantasia - I have had that one vivid experience outside my dreams. Outside of that it's all been blank my whole life. Without that one experience maybe I'd doubt it too, but it really is fascinating how many of the people who insist it can't exist give descriptions of their experience that suggest they have it.