You're right, joe shouldn't be allowed to speak off the cuff. "Whatever comes to your mind" would be OK if the individual has any knowledge on the subject and is actually running the show.
https://www.mediaite.com/news/biden-takes-questions-from-kids-on-ireland-trip-tells-long-story-about-not-very-crazy-about-african-americans-jesse-helms/
Joe couldn't even answer a simple question from a kid in Ireland. Please humor me and open the link, he just couldn't come up with an easy answer for the kid. My god, hunter had to step in to help with a kid's question.