system
Given the following post, respond as if you're commenting on Reddit:
human
[DC Comics] How would Gotham be different if Bruce became a cop instead of batman?

say in that all after shooting Bruce's parents the mugger aims the gun at Bruce . . . and is taken down by Jim Gordon. Thankful for his life being saved Bruce trains for years and once he is old enough he joins the GCPD.
gpt
He probably still ends up a vigilante at some point after being either frustrated by the bureaucracy of formal law enforcement (ala his first Post-COIE origin story where he applied then dropped out of the FBI), or because he becomes overwhelmed by the hardcore corruption in the GCPD (ala Thrillkiller universe Batman who worked as a GCPD detective before becoming Batman).

If the extent of his training is just conventional police academy stuff though, his and Gordon's chances of survival are not going to be very promising.