1 99.999765% of car drivers can barely handle 2 dimensions, going flying in 3 dimensions? Not a chance in hell.
2 the FAA will require a pilots license
3 the FAA will require aircraft maintenance. This means 99.999768% of all typical car owners will never be able to own one as they will whine like hungry babies when told they need to spend $8900 to have the engine rebuilt that is working just fine. Yes the FAA requires scheduled engine rebuilding.
4 Parking and FAA flight restrictions means you cant just fly from home to work.