One could argue that it is currently removable. You just need a grinder or hacksaw to do it. It's obviously up to you, but I assume it's a
steel shaft and quadrant, and there are welders all over the world to put it back together for you wherever you end up. If you're in a place where you can haul the
boat and drop the rudder, you're in a place where there's a welder around.
Seems like a lot of expense to do it up front just in case. I may be pretty naive about it, but you'll want to think about the scenarios where you'd want to remove the rudder. If you're in such an out of the way place, you'd probably want to use jury rigged system to get you somewhere more civilized, anyways. Do you have an
emergency rudder set-up? You may be better to spend your time and
money on a quickly deployable
emergency rudder instead. If you already have one, I think you're covered.