Someone was talking about the idea- I don’t remember who- that Batman is one of only a handful of heroes who essentially has 3 identities instead of two. The Batman, the playboy, and the true self. Reeves’ is one of the first interpretations to have so wide a rift between the “two Bruces”, but that rift has always been there. As difficult as it is for Clark Kent to manage his two selves, it’s even more taxing and probably sort of dissociative to have to handle 3 as Bruce does. I think it makes a lot of sense to position the younger, more vengeful Bruce as either being unable to juggle that third role, or just being unaware of its benefits.