"We're giving up more (threes) because we're trying not to give up as many twos and layups.... A really good three point shooter is going to shoot 35, 36% (against us)"
- Brad Underwood
And, I agree with him. Even really good three point shooters probably only shoot 35, 36% because on average we allow 31% which is pretty top-of-the-line.
So:
we tend to allow teams to shoot well from three
Is, again as I stated previously, entirely not true.