Yeah, I can tell you that the only thing CCTV does is making the thief wear hoodies. And you get some clips of them carrying expensive bikes around the corner out of CCTV range to their parked transporter.
True. I don't know from where people get the idea that the police would bother with an investigation for your (personally important) case if you had full-on surveilance.
You may have your laptop snatched, go to the police station and show them the exact location of the thieves using e.g. find my Mac. The will do nothing, even if it's in the building across the street.
Now, showing them some blurry (at best) faces in CCTV footage and ask them to investigate? Good luck.
