No because there's about 60 different factors in the insurance cost as well (crime rate in the postcode, car break ins/reported stolen cars, accident rate in the area, profession, car info, etc). If you remove 17-20 year olds from the insurance that wipes off insurers most profitable age range (first time drivers <21/25 are the ones paying £2k+ a year for their first year, vs what £500 a year when you're 25+). So for every young driver you've now blocked from driving they have lost the equivalent of 4+ 25+ year olds (based on assumption 25+ is £500 a yr vs £2k for a 18-21).
Insurers aren't going to say oh okay to recover this cost we'll decrease the rate of insurance for everyone else, common sense. All prices will be raising to cover their loss of these younger drivers.
Insurance would 100% not decrease.
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Insurance isn't based on 1 factor as it stands, unless Canada is backwards.










