IDK where you live but where I am, unless it's an actively life threatening emergency, the Police will say they're busy. I watched a drunk driver try to drive away after smashing into a parked car, ripping a wheel off the parked car. The drunk driver kept trying to start his car to get away. People called the police but they said they're busy. Fortunately his car was totaled and wouldn't start either. Over an hour later someone picked him up. If they can't even bother to deal with an active drunk driver, they aren't gonna help retrieve a bike.

Not saying confronting thieves is for everyone. But it's not necessarily as physical as you think.