Hayward isn't any worse on defense than AK.
How many more times do we need to see AK driven on, backed down under the basket, or faked out? The kid has never seen a scouting report in his life. If he can't just steal the pass he's basically useless on defense. Poor fundamentals, no discipline, and rarely does he have an impact out there anymore.
I'd much rather have Hayward recognizing his weaknesses and just "try" and stay in front of his man and rotate well on defense than watch AK just completely destroyed. Just because he was once a good shotblocker 7 years ago doesn't mean he's a good defender TODAY.