I err more on your side than Gina’s. My years in corporate tech definitely taught me that to get taken seriously you better be ready to chest beat, not undercut yourself.
That being said, I did totally resonate with Gina talking about the strength and value in beingwilling to ask questions and admit exactly what you don’t know. My experience is that people think you must really have your shit together if you’re willing to ask a potentially “stupid” question. (And usually if you have to ask most of the other people in the room have no idea either; they’re just too afraid to ask.)