Lastly - say you foul there and the Heat FT shooter does hit both. You're now up 1 with 15 seconds left and likely going to the line. What's to say your FT shooter hits both? What's to say that the Heat then don't come back down and hit a game winning 3? 15 seconds is a ton of time, especially when you have a guy who can cross the length of the court in 1 giant step. You're in control of the game, why give away even an ounce of that control? Why force your guys to have to hit FTs? Even if you do hit both of your subsequent FTs, the Heat are now still down by 3, just with 4 fewer seconds. There's really nothing non-emotional to support fouling in that 15-19 second range.