Because they think their line of work shouldn't involve any risk.. They don't want to risk filling a unit at a lower price and only being able to raise rate 1-2

Because they think their line of work shouldn't involve any risk.. They don't want to risk filling a unit at a lower price and only being able to raise rate 1-2% per year when if they held off for a year they can charge 15 - 20% more.. If you want to play that game you have to live with the consequences...