My guess is poor design. Some people like the look of transom windows but do not have the ceiling height to accommodate proportionate space for a transom. They squeeze in a transom window and it looks silly with pain deviders. (mispelling intentional)

Consider cottage style windows instead of transoms.

I've noticed a lot of interior transom window examples

??? Consider cottage style windows instead of transoms.

I went with the title.

Ya, you just lift up the bottom sash and walk into the room.