I think one of the problems is that when Otter came out, it was focusing on one thing — making a sturdier, beefier sled than Clam that wouldn’t get destroyed bouncing over the lake behind a sled or ATV. And they met that promise big time. However, that big, beefy sled is a PITA to deal with for those running solo, walking out, needing to lift in the back of a pickup, etc. Your complaint focuses on size, but along with that is sheer weight. That weight coming from the sturdier construction means it’s not very portable for so many situations.
Kind of like our RTIC is making lightweight coolers as an option to those who can’t deal with the heavy standard rotomold coolers. It creates options for all of their customers.