Even a bit less than that, “eagles” aren’t affiliated with the war and it’s own neural third party. Whereas Wayne is in the same conflicts as Buttman. The most logical conclusion is that it’s just a hobby of a billionaire, an activity that does not involve reaching some goals, like less crime or helping people. Perhaps there is some sort of (rubber?) kink in there too.

(The above is mostly a situational joke that evolves from comic books early era - they needed a themed costume & a personal identity. And physically fighting crime was at the time seen like a “good solution”, and being super rich was romantic/good/attractive. Im also aware how much with how little to initially go on the later comics expanded on these issues & made them more realistic/Bruce a good person. Imho the best argumented reason for Batman & Bruce to exists within their universes are supervillains with superpowers, ‘patrolling the streets’ is just weird.)