Quite a lot of people have both integrated Intel graphics and a discrete AMD/NVidia card.
However now that AMD is including integrated GPUs on every AM5 consumer CPU (if I'm not mistaken?), maybe VMs with passthrough will be more common, without requiring people to spend a lot of money buying a secondary GPU.
I could disable it I guess. It could provide 0.05% faster rendering if I ever get back into blender.