when we think about the availability of space, we think usually about it in terms of how it is mainly restricted horizontally but not vertically. interestingly this applies both in the micro (furniture) and macro (buildings) contexts
What examples are you thinking of that prioritize horizontal over vertical restriction? At the urban scale height restrictions certainly have a meaningful impact.
OTOH at the scale of interiors I can see how there’s a bias towards walking up to a chair as opposed to say climbing up to one, so to speak, and some of that could be a result of cultural conditioning. But there’s probably also practical incentives of cost/convenience/accessibility.
Maybe it's my own environment shaping my thinking here, but I see high rising buildings wherever I look and new ones in construction in perpetuity. Going high seems cheap, but spreading out not
The same holds true for the microcosm of our interiors: living space is precious so furniture that takes up a lot room is rather scarce. The classic coffee table is something that does almost not exist here, and not only for cultural reasons