With a conventional loan, if your borrower sinks, they still owe you the money. Lender would have collateral to possess. There is still an outstanding amount of debt that needs to be paid.
Insurance is not permitted under Islamic finance as it falls under transactions that have excessive uncertainty. There is no guarantee what the outcome is for an insurance transaction. It is like gambling, you make a bet with the insurance company such that you pay $xxx a month. If the contracted event happens (or never occurs), there is a financial winner and a loser. If in total I pay less premiums than the cost of the event, I "win". If I pay more in total for an event, I stand to make a loss and the insurance company benefits.
Interest seeks to empower people who have money by making them more and more richer. It exacerbates price of essentials such that the only way to acquire is through a usurious loan. House price are in the hundreds of thousands because people have been "temporarily" handed have hundreds of thousands. If interest loans didn't exist, then houses would be at prices which people can afford through their salary.