Stitches are load-bearing, so specifying a bartack or a flatlock seems pretty important to unambiguously specifying a garment. Along the same lines, I don't see a way to specify hardware that isn't for closures, e.g. the rivets used to reinforce denim pockets.
I know, I make clothes too. Probably unlike the creator of this thing.
But the comment I was responding to seemed to be using "stitch" in the way knitters use it, not the way sewists use it. No pattern drafting system can represent the stitches necessary to create a panel of knit fabric, that's simply not the level of abstraction they work at.
This thing isn't good but not for the reason of being unable to represent a one-strand mitten or whatever, which is what I think they were getting at.