I'll tell you why.
Ben Affleck won Oscars as writer & filmmaker.
And I do like his films. Even his almost unheard directorial debut Gone Baby Gone was a gem!
However, Ben Affleck is not lauded as an actor.
All the characters he played, he played almost the same way.
He never went crazy. Much more, he was never badass.
Not in Changing Lanes, not in Reindeer Games, not in Daredevil, definitely not in Mall Rats, Dogma, Chasing Amy - and all the other rom-coms.
Let's see, Keaton wasn't baddass either before playing Bats. Kilmer was. Clooney was kind of.
But Bale... Oh Bale the American Psycho, the Machinist, the boy lost in the war.
Along with Nolan, Bale raised the standards for all serious superhero films!
Now you got Affleck.
Pfffft.
I hope he surprises us but I can't imagine that right now.
How d'you like them apples, Gotham?