I actually almost agree with you for once mike.

However, Trainers are not trainers b/c of some marketing ploy. I know where your coming from when you say they fly bad but hear me out.

A trainer plane is/has:

A wing designed so that it will have a self correction function. It will NOT fly for you but if the wings are a little off center it brings them back to level.

Cheap. This is the number 1 reason trainers exist. They are super easy to manufacture and build, they pass some of the savings on to the customer and thus give more people a chance to enter the hobby. Cheap doesnt have to mean the plane is cheap it can mean that you can get away with putting a low dollar engine and sub standard servos on there.

Durable. Trainers are built so that they can take a hard hit and not suffer a lot of damage. If damage is inflicted then the shape and design allows for ease of repair. If you catch a wing tip on landing it is likely to break a rib or two. However if you catch a wing tip on landing with some of the lightweight models you will more than likely be rebuilding a whole wing and parts of the fues.

Tradition. These high wing ugly things have been around long before marketing ever played a roll in R/C. When you hear about someone first starting out the first thought that comes to your mind is a ugly high wing airplane with dihedral.

Im not so sure that I agree with the idea of the wing being designed to help correct its self but I guess the R&D guys are comfy with it. I also dont like the idea of the co-pilot thingy they came out with. I guess it saves airplanes but it seems like cheating