If you booked way in advanced to save money and then host cancels on you, then what use is a refund when you have to find alternative accommodation at 2-3x the

If you booked way in advanced to save money and then host cancels on you, then what use is a refund when you have to find alternative accommodation at 2-3x the price you booked? If the guarantee was alternative accommodation either the same or better as what you previously booked, this would be a much better policy.