Why would you...make a podcast given you know nothing about that person? Or rather, the podcast created by your product is not necessarily "yours." Your product should more accurately be called a somewhat of a NotebookLM by Google, synthesizing data and in the future perhaps creating a podcast from different sources for personal use, not for being production grade enough to publish for others to listen to, as one would expect from a traditional podcast about hosts and guests, like Tim Ferriss, Joe Rogan, etc. Your product is essentially LLM deep research, with text to speech in the future perhaps. This distinction is where most commenters are getting tripped up.
I could easily imagine a scenario where you do know something about a guest - enough to see that they are a compelling speaker, or have an interesting area of expertise that an audience would appreciate - without being fully "read in" on that person.
It's like when you go to a lecture hosted by an institution and they give a little intro about the lecturer beforehand. Most likely some of those little facts about the person's biography weren't known to the institution when they invited the person - they did a little extra research later to prepare the intro. They may not have known what state the person grew up in or where they did their undergrad but they looked it up in case it helps someone make a connection.