Two cents since I too think a lot about well-intentioned advice/catchphrases. Your & SW22's post just made something click for me & why it might be more or less easy for some people.
It helps me to think about starting a cranky/stiff lawnmower, where at a certain point even people w/ very strong upper bodies will need to get weight & hips into the motion. But if it's a clean, smooth, "light" lawnmower mechanism, you can definitely muscle your way through it if you want to (I should note still with some risk to your body), and that might be where people get stuck. Our training & habit histories give us strong tendencies when we move.
I think that's been part of my own problem learning DG BH - I used to spend a lot of time training mostly upper body movements & strength for other activities, and have a strong propensity to try to muscle through with upper body/arm motions. Like, almost everything, from opening a fridge to restraining my 75 lb dog when she gets too excited. I would definitely start trying to pull a lawnmower by loading my lats with stiff hips, just like doing a barbell row. These tendencies are still clearly there as SW22 is patiently trying to get my body to do the correct motions.
Now that I simply can't make progress otherwise & I've finally started to feel a better Weight Shift, the lawnmower analogy makes much more sense again. I have to get a really cranky, stiff lawnmower going, and I just can't do it without getting my butt/weight/lagged load to lead the pull, just like spinning a high-resistance revolving door. The reason it feels so foreign is because I was getting by without using it for my entire life!