The problem here is that we are labeling every beginner with the same mental and physical ability. Not everyone is the same. If you have no clue what every part of the airplane is designed for, aileron, elevator, rudder...etc, then start reading and educate yourself. The reason most beginners crash on their own is for lack of knowledge on the basics. Most people buy and airplane and are too eager to get it up in the air without even knowing what a stall is. The reason why you go to ground school on real aircraft before you get on the plane is to educate the pilot of the basics then he/she only has to concentrate on the hand eye coordination. I know for a fact that most r/c instructors cant explain the reason why the airplane flies or behave in a certain way. They know by experience and teach the student the same way....by looking and doing what he does. I have taught all kinds of beginners and usually the ones that understand the basics of flying are the ones that need me the less and end up soloing the same day or shortly after. On the other hand, those that want to learn how to fly "NOW" and dont want to listen to you explanation of the basics are the ones that take forever to solo or even crash on their own. If you do your homework before attempting to fly ,and you have a good quality trainer, your chance for succes are quite good. If you are the kind of person that think you can learn everything you need to know in 5 mins before a test then you are setting yourself for a nice surprise as far as this hobby goes.
Five of our best pilots learned practically on their own, I was there "just in case" they made a mistake. Each one of them has some background in flying either from being a real pilot or through engineering. Just like anything else in this world.....YOU CAN ACCOMPLISH ANYTHING YOU WANT AS LONG AS YOU WORK HARD TOWARDS IT.