Insurers don't care because vulnerability can be predicted by make/model/year so they a) can readily predict how much they'll pay out, are all saddled with the same cost increase (per vulnerable vehicle) and are free to pass that on to customers knowing that the competition has to do the same so they won't be undercut. Basically they don't care because the cost passes right through them with minimal friction in this case.
That assumes a static level of exploitation. If criminal gangs decide that Honda/Acura is the low-hanging fruit and ramp up theft of these vehicles, the insurance companies will have to react with increased insurance costs, which will put pressure on the manufacturers since it raises TCOO.
Insurance renews every 6 or 12 months. At least in the US criminal gangs are fairly decentralized, so it seems insurance companies are on somewhat even ground with any shift in crime patterns.
