As someone I know always says, different strokes for different folks. A few reasons, it’s tuck and flush, max clearance and eliminating that common gap, which means it doesn’t stick out as far, less overall material, thus resulting in 88lb total for the pair. Hard to beat that weight.
It’s not for everyone, and that’s perfectly ok. That’s the great part about having an aftermarket support that you can pick and choose from.
The trimming part isn’t any different than trimming for front bumper, rear bumper, fitting larger tires, etc.
Attached is the gap I’m taking about as a reference.