The 'transmission' on a hybrid is often no more complicated than the 'transmission' on an EV, many (but not all... looking at you, Hyundai) are much more simple than ICE vehicles.

Also, for the duration that most new car buyers own any car, any difference of maintenance liability of even a traditional ICE vehicle is close to negligible. Most new car buyers pay for a couple of years of fluid changes, tires, and brakes... then they trade in the car. They're going to pay similar costs no matter the architecture.