The thing is that most people either can't do it themselves or can't justify the $500 to $600 a shop would charge to r&r the bumper assy etc, cut and shut and regas the system.
If you already have the tools and know how to do it then great, I'd recommend it too.
For everyone else a 5 minute bend job is sufficient.
I for one dgaf what some piping hidden behind my bumper looks like.