Priests give Homilies, which are sermons based on the readings of the day. If today’s Scripture readings are apocalyptic, which they are, he does need to address the topic of being ready for the Lord’s return.
what would everyone have said if he completely ignored the readings and sermonized on something else? That would have been a worse idea.
So you are saying we can just read these anytime, set in stone. What are the next ones?