No to everything you just said. Structure is used to resist dead loads (mass) and live loads (people/wind/snow,etc.) . In a concrete structured high rise, the dead load of those levels vastly supersedes the live load, so the use of the buildings by either people or file cabinets or machinery is almost inconsequential. The live load requirements will really only change the structural design of a concrete building in the most extreme cases, such as a research library with 9 foot tall stacks of books spaced three feet off center.Real estate prices correlate to square footage, but there is considerably more to appeal, hence the reason design choices are made. They're not arbitrary, particularly in common residential towers that are often designed en mass for efficiency . You're almost always going to see a taller residential buildings use curtain facades with columns close to the facade. In the case of a structural facade for a taller building, it's usually on account of a strange site plan. When you see structural walls in 2-3 story buildings, it's usually because it's cheaper to frame with light gauge steel rather than a glass curtain facade and interior columns, but you can't use light gauge steel after more than a few storeys. When those those shorter buildings use structural walls from steel framing, they're usually clad with cheap shit, or else they would have gone for a glass curtain wall in the first place, because there's little reason to go cheap on framing and clad it in something more expensive because all things considered, the structural walls will reduce that natural light and negatively affect the real estate value.