Listen....


Its a smart business decision for the company to do it in two parts.
1. It saves them cash. Simple enough and you could stop right there.
2. You now have two people in close contact who can use each other to study. The small majority of time this doesn't work out is worth the positive outcome if it does work. Worse case scenario you get your own room because it doesn't work out.

If you want a single because you want "leisure time" or so you can be away from everyone you should expect to get a little ribbing for it.
Staying in a room with someone else doesn't make you "less professional".

Kids these days.......