a search on maulepilots.org regarding insurance might enlighten.
Its all numbers. The insurance underwriters are in business like most of us to make a profit if possible.
The premiums we pay are invested by the underwriters for their profit. Like a bank.
There are thousands of C180/185s insured by half a dozen underwriters. One underwriter may have a thousand on their books so the amortization of one accident claim is a fair bet for them.
That same underwriter may have way less than a hundred Maules on their books and one claim is therefore a much higher risk.
There was a time in late '90s when I had the amortization rates.
Citabrias had the best taildragger rating (many flight schools had them) Very aprox .8
Maule was a little higher rate (there's very few of them), aprox 1.9. C170/180/185 a higher rate still (there's lots of them), aprox 2.8, Husky had the worst rate and some underwriters dropped them(there was fewer of them) aprox 4.5
The longer an underwriter keeps a client without a claim, the more premiums they gather and their odds improve re profitability.
Maules are relatively cheap to repair, they enjoy a low accident mortality rate though a higher ground loop type incident rate. (poor judgement of pilot usually not getting appropriate training.
Mortality accident lawsuits are the big bad wolf for the underwriters, not the wingdings.

