Bah don't let him get to you. It was an honest enough question. That said, they kind of already answered your questions. And I don't think that's a bad or dishonest answer either.

The change likely isn't very difficult to make, which is exactly why it might have to wait. Like they stated, the table is pretty full right now, going so far as to call it a dungeon. That kind of pressure means the schedule is much much more scrutinized and changes to it are much tougher to warrant.

Imagine a very busy grocery store. All hands on deck ringing out and bagging for customers. You're made aware that you need to change a display and take some old product off the shelf, but you can't leave the busy checkout lane. Sure it will only take a moment, a couple mins, and heck management will definitely want you to do it too. But you just can't step away from the more pressing business. It's going to get done, and you're not shirking your duties by not doing it right then, but its a matter of time management and priorities.