If Congress cannot regulate the activities that substantially affect the interstate commerce they're constitutionally regulating, then what's the point?
Why regulate interstate flights when local flights are off limits and can fly when and where they please?
Well, Mr. Anarchist?
Absolute control, or total anarchy. It's not hard to see what's wrong with that argument. It's also not hard to see why the bureaucrats try to use it.
You work for the federal government, don't you?