Miami has been shooting at an unsustainable rate this postseason, that's why they're in the position they're in rn. It's been the basis of their Cinderella run.
That's the power of the 3-pt shot. You can beat anyone with it.
But when/if the regression toward the mean hits, that's when things balance out and the better team comes into focus. If Miami have any hope of wining this game (and the series) they'll gonna have to hope that they can hold that off for as long as possible. Otherwise, shyt will get spooky.