I have puzzled over the inability of many to think beyond humans living on planetary bodies. Why planets? It is essentially a planetary bias because we know of no other way. All planets in the solar system are hostile to human life, well, other than Earth. Living on another planet, like Mars (the most hospitable to humans other than Earth) requires profound effort. Mars may have resources but it also is at the bottom of a gravity well. Gravity wells are serious obstacles. Between the energy used to land at the bottom of a gravity well, there is also the need to climb out of that well.
Getting humans into space requires climbing out of Earth’s gravity well. Doing so requires achieving a speed of 28,165 kmh (17,500 mph) just to reach low Earth orbit. After spending so much energy to get off the Earth only to end up at the bottom of another gravity well seems a waste of energy.
Rotating space colonies (e.g. O’Neill Cylinders) are the best of both worlds. Real estate made to order and easy access to space.