Exactly the point of protections, they are there in the background but should never, ever activate.
To ditch an a/c you want to be as slow as possible with the minimum v/s possible. The advantage of FBW is that if you misjudge it or there's a wind shift, you won't drop a wing and cartwheel, all that will happen is your v/s will increase to the new minimum possible.
I don't know the ins and outs of the Hudson incident, but the best possible outcome was achieved regardless.
LD