This is correct.

There is not conclusive proof that so-called "broken windows policing" works as advertised.

Nevertheless:

Decent people fix broken windows - literal and metaphorical ones - no matter what the stats say.

Sometimes one of the "windows" to fix, though, is the community-government relationship. And when the only viable way to catch every graffiti artist is to stop-and-frisk every teen in the area for months or years on end - is that truly the right way to fix that relationship? Is that the decent thing to do?