Why do we need to colonize other planets? Most growth comes from inventing new things that induce demand. E.g. computers becoming efficient enough to be in eve

Why do we need to colonize other planets? Most growth comes from inventing new things that induce demand. E.g. computers becoming efficient enough to be in everyone's pocket means _everyone wants one in their pocket._ (and thus GDP line goes up) Thus to continuously grow we need to continuously turn the earth-matter we have available into more and more valuable things. Certainly it's not infinite, but I doubt we need to colonize another planet to keep up current growth rate for many centuries, we just need to prioritize knowledge generation (and thus inventions that increase value) over consumption. This usually only occurs during wartime, when existential threats to nations mean that knowledge generation is essential to survival.