Well Bill Roberts isn't around anymore to argue his point. If he was he would do so at length. The post is a direct copy and paste from his post on the Aquarius Owners Site.
https://owners.aquarius-sail.com/phpbb3/viewtopic.php?f=5&t=836&hilit=Wing+seats&start=15
Page 2 post 6.
Any one use foam under the wing seat covers? What type and thickness?
"Wing seats are OK as long as you support the outer edge of the seat woth(sic) the trap wires. This way the sailors weight travels
the same path and goes directly to the pressure in the sail, same as if you were trap out without wings."
Probably talking about racing and attempting to minimize the difference between stock boats
we add trap-seats (wings) for comfort and space. been done for decades sans trap wire support.
MN3