Some people want exactly what's in the comic books in the movie as well. (most comic book readers in this)
But some people don't care whether it's comic accurate but expect character/actor is playing good in that particular movie. (most non comic readers in this)
I personally don't read comic books and don't worry much about whether certain actor is comic book accurate.
And in my opinion, if film superhero actors also must have to be exactly like their comic book characters, then what is the point of making a film at all, all can keep read comic books.
Director of the Film should have the freedom to select the best actor for the story he wants to tell whether it's comic accurate or not.
I think ben looked really badass as batman than bale but Ben had to work with really bad stories (JL,BvS,Suicide Squad) that's why those movies suck. Bale had really good stories and that's why they succeeded. If Ben also had such great scripts, he would have done a better job than Bale.