I think those other brands have a more all or nothing when it comes to options. They are not a heavy player in supplying work or fleet trucks so they dont have to 'tier' certain options within certain trims. Which sucks for us because every option is then an add on and can increase the price rather than just being included in the trim you want. My last truck was a loaded '17 LTZ and I hated that the lumbar didn't move vertically up the back of the seat. My friends '17 High Country did though. How different is a HC from a loaded LTZ; like 3 or 4 options and the badge on the door maybe? Maybe it was an option on the LTZ's and just I missed it, but why; just include something like that when you're spending that kind of money. Like you said, the little things they seem to skimp on..
Something that also bugs me as well about GM, while on the topic, and this may be another sticking point when it comes to option's, is their stubbornness to not upgrade their current gen trucks with new options and tech. They instead wait for the next gen to roll everything out instead of slowly integrating new options year after year giving a nice refresh. This may be changing with the newer gens, but I always noticed that with the past generations.