I see. But you must excuse Blue for inferring, that since you are TTRPG enthusiast, that in two months you've acquired yet more books that you bought only to realize you'll never play. And finding that you are accumulating new books while you still may have unpacked boxes laying around for you move draws more attention to them. They get in the way when you are still setting up your new digs.
Further, it is often AFTER a move that I realize I needed to get rid of book. When packing, it is easy to get precious over one's collection and throw the books into a box. Especially since all the preparation needed in moving may make one less willing to make the effort to get rid of books.
Now, after carrying those boxes and moving them around town or across country...they come to feel much less precious.
We're just trying to help.