As a native English speaker, it also breaks my reading of "cooperate". Never seen it before. I think parent is just annoyingly eccentric for the sake of it.

Most commonly seen in naïve, and the New Yorker

I admit that latter part is just for whimsy, because I think it looks fun. The dashes I like for their aesthetics and if that makes me eccentric then so be it. They shouldn't distract anyone's reading, or at least they didn't use to before LLMs.