Pros and cons of a thin cambered wing?
As that beautiful (but rather heavy) Andean condor, Vultur gryphus, is showing, this is the go to wing for maximum lift at the slowest possible airspeed.  Not quite as efficient as the high aspect albatross, but much slower.  These wings are all about combining slightly less efficient bottom lift with more efficient (air bending) top lift.  Perfect for catching thermals and riding them to higher altitudes.
The major con is they are so good at making lift that an increase in airspeed can create surplus lift.  Lowering AOA then creates major turbulence underneath the wing, as you surmised.  Now imagine bringing the leading and trailing edges up, making a thin flat wing.
This is exactly what airliners do when they want to go 3x faster.  Condors need not worry about this.
Thin wings also lack structural strength.  This becomes a major issue with scale.  Early air craft replaced these wings with solid thick wings as size and speed increased, but camber remains a valuable tool today to help slow an approaching aircraft to a safe landing speed.