I used to DJ weddings. Set up / take down is a PITA, even when you're efficient at it.
If they're doing construction in the room, that means there's a lot of dust, so any audio equipment that lives in that room has been removed - speakers, routing boxes, etc.
If they had the room for an hour before the presser, that means prioritizing set up for Dino's microphone and making sure the set up for routing sound off of the podium and into the feed camera works and also making sure the space is physically set up the way they want it.
Also, there's probably like 15 members of the media there, so it's not like there's 100 people that absorb sound and are talking quietly.
In short, it's not worth anyone's time to do extra work so 20 people on a message board don't have something to complain about for 15 seconds.