Not irrelevant at all. The previous commenter's point was that many workflows have been made difficult/impossible by the design of the OS, and not for pro-user reasons. The iPad could support many additional uses cases without compromising at all on the ones it already serves. That is the frustration that is being expressed.
So it's a bit like saying that "this bandsaw doesn't is terrible for hammering nails." It's true, but that doesn't mean a bandsaw is a useless tool.