Yeah, but a .250 three-point shooter is more efficient than a .375 two-point shooter, so analytics says he should shoot more threes. Or something.
Technically, those are equally efficient.
Also, Cousins didn't shoot .250 from three yesterday - the 3-12 was his overall line. He shot .333 from three (1-3) and .222 from two (2-9). Now, it is true that .333 from three is vastly more efficient than .222 from two, and if you believe that those are his true numbers (obviously I don't) you would suggest he shoot threes (then crash the offensive boards).
I'm not sure that anybody here is actually arguing that, though.
One could say, eh, preseason and brush it off. Or perhaps Karl might put together a scheme based on Cousins being able to knock down at least 35% on a three that forces a paint defender to come out on him and opens the paint for cutters (whom Cousins can then find for easy baskets because he's a great passer). Otherwise, no, it doesn't make a lot of sense.