Why is it important to a lending institution that a person present a 2 year job history when applying for a home loan?

So that they will be able to get employed and will be able to npay the loan off

Because when the company that is lending the money to the person who is applying for a loan, they see that that person has had a steady income. Once they see that, they now know that they can be paid back by a portion of his income every month