I agree generally, but blame the makers I guess. One important thing to remember is bed length. Trying to haul plywood or 2x4s with a 5 ft bed is a joke, and not easy with even a 6 ft bed.
The old, small rangers used to have a 7 ft bed option! I believe the longest you can get today is 6. So if you want a longer bed, you're kinda forced into the full size fold.
I don't know how well they'd actually sell, but it'd be neat if they at least offered something maybe a hair bigger than maverick sized with a 7 ft bed.
If you actually compare similiar configurations, you'll find basically no difference in size.
Compared to a 90's F-150, a modern f-150 is
* 1" wider
* Either 0' longer or 1' longer depending on the exact configuration
* 1" taller
* Nearly 1k lbs less heavy (lots of weight optimization in the past ~35 years)