Dude. No he didn't. He ran into three defenders with a big contest (close to a block) from Tate. That's not wide open, that's not open at all. Which forced him to shoot much differently and out of rhythm - barely grazing the rim. And he took the shot with 3+ seconds on the clock.
That was absolutely the wrong play, as were almost all of Sexton's and JC's plays in the final 10 minutes.
Yeah, sure, you'll make some shots if you take 30 of them. Doesn't make them good shots.
Lauri didn't have a rough shooting night. He was 5/7 from 2 and one more made 3 and he's pretty much at his average. What Lauri had was a "not getting touches once Sexton and JC went full hero ball" night.