domestic water pressure varies around 30-80 PSI. Faucet has to deal with smoothly managing that pressure at all times (on 2 lines) while allowing selective amounts out daily for years.
The $12 ones on Ali Express will leak and break within a year. That $60 Kohler faucet may go 10 years before you need to replace a washer and 20 years with no issues before it gets replaced. Kohler faucets also have a limited lifetime warranty against leaks. I assume other higher end manufacturers offer something similar.
When measured against the expected use it's a pretty good bargain unless you get one that's super fancy with unnecessary add ons.
elon the kind of mind to cheat and justify it to himself by saying everyone else cheats so he's just leveling the field.