And why the snark about what tools the photographer is using? Do they have to fool around in a darkroom with chemicals to be a 'real photographer'? Note that their phone camera is better equipment than a generation of 'real' digital photographers had to make do with.
I think they are pointing out that just because you call yourself a photographer doesn't mean you are a professional photographer. You can't assume familiarity with copyright law from someone who calls themselves a photographer, but you can assume that familiarity from a professional photographer.