> When you elect to take more three pointers you necessarily have to resort to shooting more difficult ones, which lowers the expected return on each one.

Well yeah, the idea is not to go all 3-pointer, it's that the borderline decisions need to adjust a few notches in favor of attempting 3-pointers, until the returns are balanced out.

> Not all shots are chosen equally.

I agree, that is a proper issue to figure out.