Well my version is that I have just recently installed an uphaul on my rudder. While I am aware that for the most part yes the rudder dose usually float up however it doesn’t always. However my primary reason for going to all the effort of installing it, is I find it much easier to rig and de rig the rudder while the boat is out of the water. I then just lock the rudder in the raised position for launch and recovery. Personally I find this arrangement much easier.
I will post some more details and photos if you wish.