If you are replacing a transmission in 7 to 10 years, you are doing something wrong or got a lemon of a transmission. It's not uncommon to get 250,000 miles on an original transmission. Some hybrids still have transmissions, The Hybrid Synergy Drive cars don't. Brakes are still a thing on hybrid cars, but regenerative braking takes a lot of wear off of them. Every hybrid still has an ICE (generally just smaller ones) so things like oil changes, spark plugs, etc. still need to be taken care of.
If you want to talk about full electric cars, then you have a point about not worrying about many of these issues. As I see it hybrids generally just combine the maintenance requirements of two types of cars together.