Are you talking about rotating your tires?
Most people do not purchase new tires and mount them onto their old rims, themselves, at home. Most people do not know how to set the bead on an automotive tire. Replacing worn out tires with new ones is no less difficult maintenance than replacing brake pads.
Both, I guess. But fine, rotating tires and changing seasonal tires at least is something every car owner should be able to do.
Either way, you need to do both on both ICE and BEV equally.