In reality only solving 1 in 5 reported robberies probably means at best one in two robberies even gets reported to police. Unless you need a police report for an insurance payout, what's the point in going through the hassle of reporting the crime if it's unlikely to lead anywhere.

Imagine going to your Product Director at Startup with this information and saying "Oh, those customers just aren't real. We don't need to worry about them". You would be probably be put on probation immediately on track to be remediated.