You may have given a serious answer, or at least believe you have. Unfortunately, the facts are often self evident for what that are, and regularly undermine claims that premiums are based upon risk. How would you explain my experience as described above if they were genuinely using risk as a measure?
and had the data to prove this
No you didn't.
as I demonstrated it to be in my case.
No you didn't.
The sort of publicly available data a copper has access to has much less bearing on insurance risk than the sort of privately available data an insurance company will have.
Very specifically - an insurance company will have millions of records, from which they will be able to construct a detailed and predictive statistical multi-variate model of risk. That detailed and predictive statistical multi-variate model of risk will then be overlaid with a detailed and predictive statistical multi-variate model of customer behaviour to finesse the amount that will be charged, in order to optimise the expected profit of whichever commercial enterprise has the most control of the transaction without doing irreperable damage to their relationship to the other commercial parties to the transaction.
The net result is a premium which is closely related to risk, but also closely related to other factors. If it weren't the case that insurance premiums were closely related to risk, then adverse selection would rapidly ensure that whichever company wasn't charging a risk-related premium would rapidly either be swamped by excess claims or end up with a tiny handful of policies.
Any individual who fancies that by a bit of random searching on single reference points on databases which are proxies for, but not directly related to, the actual cost of claims to an insurance company is deluding themselves. Very specifically, theft from the owner's premises is a relatively small proportion of total risk - and police records are only a proxy for what is actually claimed for. And RTAs outside the owner's house are completely irrelevant to the actual expected claims for injury. Because drivers have an annoying habit of driving their cars on roads that
aren't just outside their own home.