I had a £2,000 electric bike stolen in Oxford. No worries - it had a GPS tracker, and I could see it heading to Birmingham up the M40. Also, my neighbour had CCTV footage. You couldn't make out the faces or number-plate, but you could see it was a black Mercedes. It was taken at about 3AM. So they had "liberated" the bike (it was locked up), and immediately headed out of town. I'm sure it was scouted, then they came…
They have limited resources, and can not go after every criminal, even if it's a slam dunk case.