Are unique expert quotes helpful

As an example l, if I were to make contact with a mortgage expert who appears regularly in the media and get a unique expert quote from them which I can use on my page about mortgages, could I expect google to recognise the weight of that name in the industry somehow and give me a higher EAT score for my page?

I hear this from SEO people but I have always been suss on it as being an actually good tactic.