Many of the questions listed in Should we limit [quote] questions? are questions examining a claim that X said Y which involve an appeal to the authority of person X.
However, I'm not wondering about skeptics.SE policy. I'd like to know how to discourage appeals to authority (or at least banal and irrelevant appeals to authority) in real life, outside of skeptics.SE.
I've heard of yourlogicalfallacyis.com (in particular https://yourlogicalfallacyis.com/appeal-to-authority ), but to me linking to a website like that is only useful when you're telling someone you don't like that they're wrong and to STFU. I'm more wondering about basically telling someone that I more or less agree with (or understand) their opinion about a topic, but sharing a "quote" by Einstein isn't the best approach.