And even private aviation requires hundreds of hours of experience and deep understanding of physics and extensive training before even being allowed in the air on your own. Let alone to fly others that's a different training and license. Using those fancy “it flights itself” autopilots require several extra thousand hours of experience and specialized training, a commercial license and to be under the supervision and employment of an airline. Otherwise you are barely allowed to use the plane version of cruise control. Even after all that, you are still required to maintain your training with regular recertifications every few years, and a set of several hours of practice flight every year. Miss either condition and you lose your license.