I realize that the OP is asking a balanced " Why?" , this is directed towards others.

AAAAaaaaGGGGgggg. .... I lived in a house on top of a hill , moved to a valley and now my flood insurance has gone up. THEIVES . . . .

Ins rates are based on risk , likelihood of having a loss.

A car without ABS _IS_ more likely to hit another car at some point, increased rates ( or discounts on the ABS car ) reflect that fact.

Insurance works like this. A pool of people will have X number of claims based on statistics and past experience. Each person in this pool is assigned a likelihood of having a claim then the total cost of claims is spread across ALL people according to their likelihood of experiencing a loss.

Add in some operating expenses, emergence buffer and profit ( OOOooo, that EVIL WORD ) and you will have a yearly premium.

Will there be variances between companies? Well sure, this goes on in any business. Those that think ins companies are evil should have a long hard look at their retirement portfolio, you will almost certainly have a few ins cos in the mix. At this point you will be faced with a ethical dilemma, pull you ins investments or leave them in and continue to make money. What will you choose?

Also, those that don't like the situation could start their own ins co but, I doubt that they ever would.