For me, the issue was that the writing style, like most articles written by programmers, passed off every thing as fact. Things like "they have the same chord progression" in section 2.a is patently false. This kind of writing is misleading to others, especially newcomers (blind leading the blind)
I do agree though, that to do somethimg, learn something, have something almost correct is better than having learned and done nothing, but as Bill Evans points out in the youtube video about the learning process, it's much better to start with something simple, concrete, and which you know as true then build from there, than start approximating (incorrectly) lots of things at once. So it's a case by case basis, but it's not merely gratuitous arrogance that motivates people to call other people out on false statements.
I do agree though, that to do somethimg, learn something, have something almost correct is better than having learned and done nothing, but as Bill Evans points out in the youtube video about the learning process, it's much better to start with something simple, concrete, and which you know as true then build from there, than start approximating (incorrectly) lots of things at once. So it's a case by case basis, but it's not merely gratuitous arrogance that motivates people to call other people out on false statements.