I agree with what you say, but as a sailplane pilot and avid
HG pilot ; i really wouldn't mind having control over
the height above the water, on a machine like a foiling Catamaran.
IF
the controls were made Simple !!

Had this same discussion with a world class Rigid wing pilot
who also happens to be an airline captain, and avid sailor .
He's the one who convinced me of such .
Only the
inept arm-chair sailors
Need a devise that does this automatically.

Think about it : Your on a broad-reach, in 3-ft chop; you
really want some mechanical devise telling Ya how High you should be above the water ?

Bille