Out of all the things that I could imagine harming Nostr, envy wasn't very high on the list.
My first wild and maybe unsubstantiated guess would be, that creators are used to being the celebrities elsewhere and take it hard, that it doesn't work like that here yet. (sic)
Exactly the disparity you are describing usually applies to other plstforms in reverse. Creators are usually praised for every fart, while devs don't get any attention.
I'd say this is caused by (CMMIIW) Nostr having a user base with an abnormally large share of tech and devs. (for now) I think however. that this will eventually stabilize and as Nostr gets eventually settled by normies, things will become more and more like elsewhere.
Also why is not getting Zaps so frustrating here, but not getting any Zaps elsewhere is not? They likely went through rheir entire career without a single zap until they joined Nostr. Why would that suddenly be a problem?