If you don't ask specifically, they will just tell you the building number. More so you know in what direction you need to head in after the parks. Or where you need to park.
However, they know EXACTLY where your room is. For example, I checked in to Pop Century last month and my only request was for a king bed. I was told at check in that the request was met, I was in Building Two on the first floor and to park in a certain lot.
This are just my thoughts but I can imagine someone getting to Disney World at 8:00 AM and being told that they are in room 2103 (mine at Pop Century) but it's not available yet. The room key doesn't work but the person goes over to that room and sees my husband and me packing up and taking our time to "check out" as we don't have to leave until 11:00. We are driving home so no pressure on us. But there is someone outside really wanting the room. Maybe even banging on the door to get us out earlier.
So we do leave and now housekeeping needs to do the cleaning. That somebody could hunt her down and get her back to that room to clean it right then and there.
Extreme example but it could happen. And one I don't wish would.