1) The premium to risk cost is astronomical compared to other forms of insurance.
2) The owner's policy really only protects your equity (like if you put down 20%) but costs more or the same as the lender's policy (the other 80%)
Payout rates by insurance type:
title insurance - 1-2%
car insurance - 70-80% (lately close to 100%)
life insurance - 96-98%
homeowners - 60-70%