2023 LE Steering Wheel Wear - only on bottom?

(Wheel is turned to more easily take picture, but it shows bottom of wheel).

Just bought this 2023 LE preowned and I’m a little bummed I didn’t notice this wear until today.

Ultimately, a minor issue, but I’m curious. It was a former rental, 17k miles… I would be unsurprised to see this wear on the top or sides, but it’s only on the bottom, and actually most noticeable on the inside of the wheel…

What caused this? Seems like disproportionate wear in an area that wouldn’t usually be gripped much.

Anyway I ordered a wheel cover