… People would be more likely to know the area of their home/floors vs the total volume…

When’s the last time you saw a real estate ad with cubic inches/feet/meters on it?

This makes perfect sense.

Who lives on a plane?

You see this on a lot of products. This is because a lot of people simply don’t understand how cubic meters work, or need to think about it where they know pretty much how much floorspace they have. And in practice it doesn’t matter, most people have ceilings somewhere around 2.5 meters and these indicators aren’t that precise anyways.