I said more options than real life, not "exactly like real life." But even Earth alone is far more than an empty rock, having diverse biomes to explore by itself, jungles, oceans, deserts, more cities than you can shake a stick at. Add on terraforming concepts, domed/underground colonization, and space stations, for beyond earth destinations you've got well more than "empty rock."
The plots of harder sci-fi are quite varied. First contact, robot rebellion, transhuman war, interplanetary war, generation ship colonization and survival, etc.
Seems a bit more diverse than Space Opera's evil empires and aliens coming to destroy all life as you know it, which are largely used as retreads of fantasy tropes.