Having worked at a car company, this is categorically false. Cars have thousands of moving parts (even EV's), are expected to operate reliably for a decade, represent the second most expensive thing most people will buy and any mistakes will kill people.
If it were easy, we'd see a lot more profitable car companies.
Thats the list of moving parts. Dunno where you got 1000 moving parts from. Most each one of those has reliable manufacturers that have figured out how to build them correctly.
You also have the cars power steering system, AC unit, tons of additional pumps, doors / locks / handles, relays, etc. Not to mention each of these parts has bearings, joints and brushings within it.
Reliable manufactures? Auto suppliers are notorious for being unreliable - the supply chains are exceedingly complex, there's constant pressure to drive down cost and quality control lapses are a constant issue.
Not to mention each vehicle has hundreds of different suppliers and an issue in any one of them will grind your manufacturing line to a standstill.
If it were easy, we'd see a lot more profitable car companies.