Thank you for looking into this and your through explanation!
if it doesn't get in a release should not appear in stable distros.
No, that "compromise" [merged](https://gitlab.gnome.org/GNOME/adwaita-icon-theme/-/merge_requests/65) during the past dev cycle, and was included in the tagged release. All rolling/current distros that default to Adwaita will be missing right_ptr.
There'd be cursor chaos currently among apps, I'd imagine, had they moved to strictly/only supporting CSS cursor names as was the intent of the original change this cycle.
Not sure this issue warrants a separate option, as the default cursor is simply displayed over margins, and this can only really be 'seen' by the system journal error. Cool to know you'd be open to a PR tho!