Basically I think it is unfair that people made unemployed will usually get most if not all of their rent paid whilst people with a mortgage usually get nothing for 9 months.
I don't think people should get help paying the capital part of their mortgage, but they should imo get help earlier to pay the interest and thus keep their house until they get another job.
I know in theory people can get help with interest payments 13 weeks after they start receiving certain income based benefits. However in practice most people who have been working are entitled to contributory job seekers allowance for 6 months. This makes it unlikely you will qualify for the benefits you need to be receiving to be able to get help with mortgage interest. Even if you have exactly the same income as you would have had if you had been claiming income based benefits.
So in practice, most people get no help until after 9 months of being unemployed. Many people would have had their houses repossessed by then.
I wouldn't mind so much if home owning was confined to the well off. But many people who can't get a council or HA house end up buying on low incomes.