He might take it to heart or he might not, it's up to him himself.
Jojo just a very taciturn guy even if you try to talk with him in Japanese. You only see him talk at length about stuff on Twitter (he goes on for several tweets about VB updates, for example), but never to anyone else. (He seems like an interesting person and I just want to be friends with him ;w; but I can't help it(or try to) if I'm so boring to him, so such a feeling that ends up being non-mutual and it makes me depressed).
Back on topic, I learned that concrit is needed if you ever want to get better at your craft, along with self-studying etc.. I sometimes ask the Discord for feedback on a WIP sketch, sometimes I don't. It really depends on my feeling on the pic itself.