Okay! I'll rephrase that for you.
Was I being too literal, too pedantic?
Seems to me that you've chosen a very literal reading of - "When your hypothesis does not fit the reality, it is not the reality that is wrong." - and then switched context away from a quarrel about how the phrase "Fine Art Photography" has been used and should be used.
I don't think the quarrel, or that statement, was about the ultimate nature of reality.
So if we're going to rephrase their words, let's do so in a way that might shed light on why there's a quarrel, and what's stopping the quarrel being an argument - When your
hypothesis does not fit [my]
reality, it is not [my]
reality that is wrong.
(But if you wish to pursue the philosophy seminar: note that logically we can make false claims, and note that perceptions can be contradicted by other perceptions without "absolutely certain knowledge of what reality is".)