So good to hear your Mom's condition is improving and I hope she continues to do so. And I hope that allows you to enjoy these last few days of the voyage a little more than when you were earlier in the week.
You make a valid point about lectures and no matter how interesting the subject matter could be it's a make or break depending on who is the presenter. To the opposite of your experience, a few years ago we attended a lecture on geography, neither one of us being all that interested in the subject, but just figured we'd go hear the guy talk anyway! An hour later we came out of the theatre amazed at the information presented and couldn't wait to return to his other lectures the rest of the cruise. As a college professor, I envied those who studied under him he was that good.