I think that interviews by the same officer who has the intention to reject someone might not be that useful. The interview will not change someone's mind if they believe that.… If they're still stuck with that dual intention issue, which is not valid under the law, or if someone still thinks that this person, despite all the proof they have provided—and even if you produce a house deed, your pension plan, you have kids in China—they still believe someone is going to stay here, then yes, of course an interview is not going to change anything.
Maybe an interview by a different officer or by a different system, by a separate office, might be different.