Because the R5 and to some extent R6 are out of reach for enthusiasts on price, the pros who buy them rather than a Hasselblad are content creators/wedding photographers etc. and those segments are all hybrid photo/video. They often can't afford the Cine range which is more expensive and need to take photos. Also phones take photos and videos, to some extent the competing device with any camera these days, photo or cine.There's a whole Cine line of cameras from Canon, why can't film makers just buy those and leave our photographic cameras alone.
I don't understand this obsession with making everything into a video camera.