you are seeing things as they really are .
Here is the short course:
On these small slow planes -- the thick wing is easier to build and get best strength.
It also is LESS efficient- but less critical to angles of attack.
So -if you could build it at say 5%- yet mantain rigidity -it would fly just fine .
We have tested this to a fare thee well.
radical angle of attack changes with no funny tipping /snapping etc., is easy
The secret (no secret ) is make it as light and strong as possible lots of control throw -lots of reserve power .
and make it at least as long from prop to tail as wing tip to wing tip -
All rules about "why do things fly "and CG nature does apply BUT the very nature of being small and light gives you a huge window of design to play in .