It's only stupid because he doesn't get the ball, had he got it, oh what a wonderful tackle it is.
And he doesn't get the ball because it's nigh on impossible for him to get it. Had he got the ball he'd have been lucky. Top CB's shouldn't be taking huge gambles going to ground in the penalty area unless there's a very good chance they're getting the ball, and certainly not doing so when the striker's running away from goal. Again, it was a stupid tackle.