Why? Because our social instincts don't change terribly fast, being coded in DNA. Our hardware/OS is more or less what it was when the last ice age ended. Nobody has extra arms or hearts. People still use "look each other in the eye" and other old school tropes to decide if they are comfortable with a new person.
The only thing that changes us is when some guy figures out you can melt certain ores and turn them into sharp tools. Or when some lady finds out the seeds she harvested from a certain grass can be nurtured into new plants.
Innovations like this change the economy and allow us to organize society differently. People no longer need to spend a large part of the day washing clothes. These days you don't even need to know how to farm or hunt. That means you can do other stuff while still having your needs met.
The only way to solve our social problems is to try to think of better ways use the planet. That's technology.