I feel this is a bit of an exaggeration tbh. 
I like Hayward and he's a very good player, but I wouldn't consider him a great player.  Among NBA SF's I don't think I'd rank him top 5.  
I also feel his defence is being overrated here.  I think he's improved as a defender compared to earlier years (he used to be pretty poor) but I still wouldn't rate him any more then average, maybe slightly above average at best. 
That said, I'd be very happy for him to prove me wrong 
