Right from their website....
"Easy Install Process- We’ve examined at the most common frame bracket designs for Cherokee bumpers and simplified the process… No more removing your steering box. No more 2 piece designs. No more frame supports… Our entire bumper goes on without drilling, welding or grinding."
Why they wouldn't want to tie into the steering box bolts, I don't know. I feel like that is where the most strong tie in comes from for any bumper that houses a winch.
Plus "tuff stuff" looks like a bunch of rebadged chinese garbage. I would look at dirtbound offroad. Way better construction.