There is still so much to learn about life in microgravity. And living in Orbital space stations isn’t going anywhere. If you are thinking long long term it’s more likely we’ll be disassembling planets to produce O’Neill Cylinders since planets are an inefficient use of matter.

Information isn't shared as freely as people think. A nation having its own space station goes a long way in studying the effects of space on individuals and trialing ways to sustain operations over the long term on other planets / moons.