I see this as a high probability that "we" don't see what they see. Problem is, no 2 lakes are the same, but in most any lake-from the state's view- if you have a 15" limit, you're going to have high numbers of 14" fish. In a lake with 18" limit, 17's and down are the rule.
In KS, when they allow a change to cull smaller fish, it's a short-term fix for a problem they see coming in another species present.
They may not tell you that, but I've seen this from the "inside".
Note they also say high density, slow growing fish in small impoundments. I think it's also reasonable to suggest mortality goes up with size of impoundment as a rule.. more nest destruction, less favorable habitat, more adverse conditions..
Understanding what the target is through their eyes may be hard to determine.
I did catch a couple of things in Randy's video that still suggest his views are angler perspective and not biological perspective (both legit) but who knows??? Interested in seeing how this progresses.