Apple doesn't get into low margin businesses. They get into an adjacent business. A prime example is TVs. There is no Apple TV set. There is AppleTV, a high margin add on for any TV with HDMI that makes it "just work". They had the chance to buy a cellular carrier, but chose not to, because it's low margin. Instead they make a phone that works on any carrier. Cars are a low margin business. But a car add-on could be…
Porsche sells hundreds of thousands of vehicles per year with something like $20k profit per car on a $90k average selling price. There could be big demand for an innovative Tesla equivalent that didn't have so many build quality issues.
And Foxconn is desperate to get an Apple car contract. Car companies really screwed themselves by outsourcing everything to suppliers (who have much higher profit margins than the car manufacturers at this point) except the internal combustion engine which is losing importance fast. What I am seeing here for Apple is big demand, low barrier to entry, and high profits.