I don't really agree with you on the landing and the jetties (golfbreakers) , just requires a slightly different technique that is by itself not difficult to learn or execute. Personally, I don't know anybody who leaves or lands on the beach with their lee rudders locks. Sailing with a luff rudder only and a bit of daggerboard has been standard surfsailing technique for many years now.

"a bit of daagerboard" means setting about 15-20 cm daggerboard and take most of the weatherhelmout of boat unloading your single luff rudder while traversing the surf zone. This is shallow enough to get into the NO surf zone before the daggers hit the ground and even if they do then the protrusion is so little thqt both daggerboard and hull cn take the impact. But in 99% of cases your liftthe last bit out just before your step of the boat in knee deep water ( in bijvoorbeeld de mui)

Wouter