Landlords don’t care if your rent is sustainable for you in the long term. They have nothing to lose if at one point you can’t afford it anymore, someone else will.
Banks on the other hand care very much if you’ll be able to pay your loan in full. Even with the house as collateral, it’s much better for them if you just paid your loan instead of them having to deal with all that.
Also debt is an asset for banks. Having people in debt for 30 years is better than having people in debt for 10 years and then selling their house.