Loan interest differs from one borrower to another. Lenders will examine applicants from different angles to come up with a measure of their credit risk. If someone is a risky client, then he is likely to get a denial. The best that he can hope for is approval with a high-interest rate. On the other hand, someone with a low risk of defaulting on payments is likely to enjoy low-interest rate loans. This is how virtually all lenders operate.
Banks will check the applicant’s credit profile to know whether he has been able to honor past obligations. The profile will include past loans, what they were for, how long it took to complete repayment, and how many missed payments there were. Sometimes they will be content to look at a credit score but they will often delve deeper to get to know their potential clients and have a fair evaluation. Much can be lost when you are restricted to numbers.