The only problem is that if you do not have a slider hitch installed and the one time you need the hitch it will be too late.
I have a 16 K Resse manual slider in hitch in my 2008 Ram Mega Cab short bed truck and I did hit the cab just once. I was in a parking lot and did not extend the hitch before I tried to park. I thought I could get around a couple of other trucks and vehicles to fit in to the parking space. But I had to back up and the trailer jackknife before I new it. The left rear corner behind the door has a small ding. I was towing my old Cougar 318 SAB with the 88deg corners on the front cap.
So it is your money and your truck; but stuff happens!
I also always extend my hitch in what ever campground we enter. First thing out of the DW's mouth as we enter the campground is extend the hitch.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67