Lol, humanity is great at legitimizing things that's for sure!  I'd say it's not needed, however, that doesn't make it better for longevity/lifespan.  Could argue it saves weight thus gas mileage improvement.  But you got it, it's about improving profit margin at the company through less parts and processes.  With that said, over time things like this do lead to improvements (sometimes) in newer generation tech down the road.  Ex.  Original mechanical fuel injectors were a pos.  But today, they are a far improvement over the carburetor.  These engineering/learning pains are sometimes required for improvements.  Yea, I'd want a trans cooler on it too unless I found/saw significant improvement in the radiator department (size/capacity) on the Tundra (primary trans cooler).