...Seen & righted many rolls and flops; fortunately injuries are very rare!.. Amazingly so, really... Falls/kitchen/cooking injuries happen far more often in the woods.
I really have never seen any reason for shackle mounts on bumpers when hooks are so much quicker and easier to use... (looking cool would never be a consideration, although stopping rattles would be a reason not to keep shackles on the bumper).
I keep the shackles for "hooking" to vehicles without tow hooks and for connecting straps, snatch blocks, other rigging.
Enjoy!