Why do you assume they can't innovate with a third person perspective and that people who want that only "want more RE2R?"
What makes people asking for first person so different that you can't say they just want more RE7?
It's not that they can't innovate in third person, it's just there's about 102 third person RE games and only one in first person. (Well, minus the on rail shooters.) First person is still mostly uncharted territory for the series and therefore there are more chances for new ideas to emerge, especially in the VR space.
Also, there are people who are literally asking for RE8 to play exactly like RE2R in this thread, that's kinda who I was addressing.