I'm interested in this from another angle: why DO you love Batman '89? It bastardizes the character. I understand times were different then, and standards were different then, but having been born in '86 and seeing it early in life yet not having the reverence for it that some people do, I just don't get the love.
Batman kills! Alfred lets a JOURNALIST into the batcave! Joker kills Bruce's parents! I believe Bruce's dad is not named Thomas, if I recall correctly?
It might not be faithful to the comics but it's still an awesome version of Batman but more than that it's a classic movie with memorable scenes, lines, characters and visual look.