This is WILDLY inaccurate. For one, Lowry was going to be gone no matter what because he and McHale didn't see eye to eye. And even if he didn't, he and Harden could never have played together, because the Rockets acquired Harden using the pick they got for Lowry.
It wasn't like Lin was the only option and they had to stick with him. They had two superior players, playing the same position, available for less money per year. What is Lin's purpose, to be a slightly better rebounder at the PG position?