Yeah, Scarecrow should be as interested in fear and scared people as Mad Hatter is with hats and Riddler is with riddles. A good Batman villain is an *enthusiast* beyond all reason. Making them all Gruesome Killer Monsters is missing the point.
We've lost that recently. Joker seems to have no opinion on or appreciation of comedy - and we're meant to take Mad Hatter more seriously when he kills hundreds of civilians whilst dropping Batman's girlfriend out of a helicopter.