There are probably a lot of people who buy a Rubicon because it says Rubicon on the side of the hood. There’s many who would buy because of the 33’s, the lift, the fender flares and the hood, and many who just like the look of it.They want people to buy Rubicons. If they had a rear locker on a Sport they would sell a lot less Rubicons. The amount of time you need a front locker is minimal for 90% of people that off road.
Then there’s the people who actually need front and rear lockers, 4:1 t-case, upgraded axle shafts, wide track and elec sway bar disconnect.
I bet the first group is the majority of buyers, and they’re going to buy a Rubicon anyway.