They aren't equally difficult problems. From a thermodynamic perspective, all processes in your environment deteriorate into either waste heat, or is moved outs

They aren't equally difficult problems. From a thermodynamic perspective, all processes in your environment deteriorate into either waste heat, or is moved outside your environment with work.Low-cost heating is easily available, whereas cooling can occur by moving heat to another location. So for heating, you can just max out on insulation, decrease your surface area to volume ratio, and the waste heat from interior equipment will be more then enough to provide 'free' heating. If you outdoor temperature is high (so natural ventilation doesn't do anything), there really isn't much we can do other than try and find higher and higher efficiency heat pumps to cycle out the heat, but even then you're just dumping the heat outside which creates its own issues. We can reflect/control short/long-wave radiation, but the sensible heat from the environment is a problem. Not an impossible problem, but requires more sophistication to resolve.