What about bringing family, relatives, friends, coworkers etc with you on the car?
If its only about you and your wife/gf and small kids then that's ok. But sometimes you might have to put adults into the backseats
you don't buy a car for the worst case scenario. you buy a car for the most common scenario. besides, China should be doing the best to limit car ownership to ~30%, encourage transit and use electric/hybrid to substitute for, not add to, ICE vehicles. it looks to me like this is the case since parking and registration cost more than the car itself. 30% car ownership is still a gigantic car market that nobody can match.
even electric cars still only solve the greenhouse gas issue of cars. cars have other issues, especially in China: parking and roads take up lots of space for low capacity transportation, it reduces maximum urban density, it makes streets more dangerous in general without special pedestrian/biker access routes, etc.
Hong Kong got many things wrong but their urban infrastructure is 100% correct.