Remote = far to drive for essentially everyone (farther than Mammoth/Tahoe, even coming from Reno). Hitchhiking is not the best option to rely on. Once you’re in, you’re also the farther from help than anywhere else in the Sierra. Duck Pass and much of the Tahoe area has cell service.

Rugged = safety traversing passes can require an ice axe and/or crampons (plus the skills to use them properly), depending on the conditions. That region is at high elevation which becomes problematic for people. Lots of inexperienced backpackers get airlifted out of there because of acute altitude sickness. There is a lot of weather exposure (harder to get below treeline if a storm rolls in). Bigger stream crossings, which tend to be the most serious danger to hikers.

I don’t disagree that Bishop rules and the area is (extremely) beautiful, but it’s absolutely not the best recommendation for people who are trying to backpack for the first time. Doable? Yes. Advisable? Not really.