They’re easier to build than internal combustion engine cars. But that doesn’t mean they’re easy to build in general.
If they were easy to build, European car companies would have no problem to build them.
Of course, putting a battery and an electric drive into a car is simple. Electric cars are 50 years older than combustion cars. But there’s a reason why they did not took off in the 1840s and why we did not use electric cars for 180 years — building usable ones is difficult.