Jake Burhans argues that a beginner's mindset in conversations keeps you open to learning from anyone, no matter their experience level. Assuming the other person knows something you don't prevents the closed-minded dismissal that wastes valuable dialogue.
I always try to remind myself, no matter who I'm talking to, there's always something you can learn from them, even if they're just starting out. If you go with the mindset like, oh, they're a beginner, there's nothing for me to learn, you're going to be completely closed-minded and you'll get no value out of the conversation. But if I go into it thinking, probably something that they know that I don't, I at least get something out of the conversation. I'm much more open-minded and I'm getting much more value out of all the conversations I'm having, no matter what level