Yet it is a captive market. If I am in a building, I only have access to a singular type of elevator. Why not always give the smoothest ride possible unless it is $0.12 cheaper for the installer, so everyone has to suffer forever.
An elevator that feels significantly different than the other elevators in the city probably results in more complaints to building management/maintenance about either "the elevator is too jerky!" or "the elevator is too slow!"
You could just as well ask "why not give the fastest ride possible so everyone saves time?"