I agree.
There are houses in my road where the smallest bedroom is 2.7m x 1.75m. They are tiny! There is just enough room to get a skinny wardrobe at the end of the bed along the long wall, and a narrow chest of drawers alongside the bed so it doubles as a bedside table.
It's not possible to have a high bed, because the roof is hipped so the ceiling is only 2m high along the outside wall. They're fine for a small child, but there's nowhere for an older child to do homework.
All the houses were built to the same footprint, but some (including mine) are 2-beds with the bathroom upstairs in the smallest room, while the 3-beds have a tiny downstairs bathroom and a kitchen in the space that's a dining room in the 2-bed houses (now mostly knocked through to make a kitchen/diner).
I grew up in a 1960s build council flat. Back then, social housing was built to minimum space standards ("Parker Morris standards"). The smallest bedroom was 2.7m x 1.7m, so not much bigger in floor area than 2x2. But it had a decent sized, full height, built in cupboard that held tons of stuff, and there was room to build a desk by fixing a deep shelf to the wall with a chest of drawers beneath.