how? you realize Batman isn't the only detective, and detective is the focal of Bryce Wayne's identity. Barry makes just as much sense to be considered a Detective as Batman because a) he at least actually works for law enforcement and b) he uses his deduction and forensic skills to solve crimes all the time.
I don't understand people who get all pissy about character overlap; especially with the Flash. it's like when people were complaining about speedster having different color electricity because Black Lightning uses different color electricity. it's silly.