Since the start of DCU, Warner Bros haven't brought us a Chris Evans or Downey jr, or several of the others. That says something.Their castings tend to be a little more interesting as a result, regardless of outcome. MCU castings never come off as very bold or inspired imo.
Only Gal Gadot can come close in comparison. The other actor choices don't reach that level.
And she was good luck on WBs part, nothing more. They had very little clue it would turn out that good.
With MCU however, they strike gold with every new leading actor they cast. It could be because they actually know what they do.
Casting against character just to have it interesting, and the studio itself not being sure of the outcome, is nothing more than a little risky game they want to play.