So here is my take.
Fixed steers are comfy once you are up on them, but if you are jumping on waves/surf the impact on your hands is pretty harsh (yes, suspension steering makes it better but it's still brutal compared to a pole)
But the other thing to consider is mounting them once you fall off, if you are on an inland lake you can take your time and balance back up on the rear.
But if you are looking to quickly mount you are gonna be side loading and that does require some muscles to pull your self up every time.