Chinese cars are barely being imported in the U.S. (Three models so far). It has taken many years to get this far, and will take longer for them to have a similar reputation as, say, Korea.
Tesla has done well in the luxury car market, but they've been late and had quality issues. The Tesla 3 is not out yet and there is still a big risk they'll fail.
So, "laughably easy" is a major exaggeration. It's possible to launch a new car company but nobody finds it easy.
