He already does all that on top of being batman.

He does do those though?

There are better places for superheroes. As I note above, there's a lot of elite deviance / white collar crime that Batman's amazing detective powers could easily be turned on. Heck, the US has been occupied and is controlled by a dangerous religious cult with a rogues gallery of masterminds vying for power, and they're behaving conspicuously like comic-book villains.

On the street level, a mega-corporation fighting a labor organization for control over the workforce would be a great venue for vigilantes with extraordinary powers. Eventually they'd higher a PMC task force (possibly with a cadre of G. I. Joe like specialists) as the Guy of Gisbourne to our protagonists' Merry Men.

There are a lot of directions that can be taken that pit vigilante justice-seekers against sociopolitical bullies with wealth and power. DC needs to just do a bit of brainstorming, but no they'd rather Batman fight the Joker for One More Time. 🥱

Supernatural evil is not realistic. And when we encounter unearthly natural evils (which we do!), they tend to have solutions that are not a flying vigilante putting out street-crime level fires.

Deep geological repositories for storing vitrified nuclear waste, for instance. We have those.