I don't think any of the old USA design, LGB design, Aristo design, etc.. was 'stupid'. They are natural progressions based on available engineering, materials, and resources (money). Look at the history: Narrow gauge = short trains . As things evolved, we, the users, demanded standard gauge models, and then we demanded they haul prototypical length trains. I am as guilty as anyone, but the toy train moved in the direction of model, while still being an electric train, there's a lag. And I believe the manufacturers chose to spend more money on the details of the model than what was going to move the model. Let's forgive them for that motivation and move on.
I do as USA Trains uses all metal gears in the Hudson, GG1 & Big Boy. The first 2 engines came out way before the SD70's but USA stuck with using plastic gears. Natural progression of design?? I don't see it.