"Intervention" by Apple in the automobile industry makes a lot more sense.
It's better to have all car makers integrate Apple systems in every make/model than to make an entire Apple Car.
Apple can further intervene in the automobile industry like they are doing with CarPlay today and with ApplePay in the payment industry.
Today we have the CarPlay entertainment kit, tomorrow driver assistant kit, and then self-driving kit.
Cars first, then airplanes, then space...