In theory, that's what insurance companies tried to do with the wind/hail deductible, but it obviously hasn't worked out for them in a lot of areas.
I have 2% for wind and hail, which is "standard" in my area.
I just got a new roof. My 2% deductible is $8k.
Adjuster came out and wrote up a report approving $20k for a new roof, plus my $8k deductible. That's $28k total.
I had already decided to use a roofer recommended to me by others who were satisfied with the work.
Under the current insurance claim model, homeowners have no idea what the "fair price" of a new roof should be, nor do they have any incentive to shop around and find a better price. It's all based on what the adjuster says insurance is willing to pay. And as soon as a roofer sees the claims report, the dollar value on the report is going to be what the roof costs.
In my case, I'm out $8k no matter what the total cost is.
Insurance company sent me both checks before the work on the roof had even started.
If the homeowner were on the hook for a larger percentage of the cost of a roof, they would have skin in the game. Maybe people wouldn't be putting in roof claims as often and pricing would become more consistent and transparent.
The other part of this issue is insurance companies not wanting to insure roofs that are over 10 years old, either through dropping customers or jacking up their rates. This is nuts, but if the overall number and/or cost of roof claims goes down, it might relieve this problem.
Insurance companies created this problem, and they need to fix it (in a way that doesn't screw homeowners).
As a side note, my parents' deductible in MS (where Katrina hit) is $30k on a very modest house - roughly a 10-12% deductible. That's not by choice - it's the best policy they can get.
Basically, insurance isn't paying for new roofs there (which is what happens when you raise the deductible too high). So, technically homeowners may be insured, but in reality, how many homeowners can cough up the full price of a new roof? At that point, the policy isn't worth the paper it's written on, at least from the perspective of a mortgage company trying to protect their asset.