I think the GPU being separately upgradable on the 16" pokes a tiny hole in your argument. But I generally agree, there’s not too much that is saved or retained when upgrading. But for some people it’s worth it, if they’re reusing the ram, SSD, Wi-Fi card in addition to the parts you mention, AND they’re not too rough on the case, screen, and keyboard/trackpad.
Huh, my first thought was that they’re tracking the food and aid shipments so they know where people are hiding