This wasn't Earth where you were at peace with your life and had the luxury to take things slow and steady.
And while most might argue that 'Oh, there is financial pressure' and all that… in our time.
Compare that to having to live in world of constant horror, where your motivation isn't to get rich quickly, make family proud or all of that.
Your motivation is monsters and villans!
A tough brutal world where if you aren't tough and brutal, you would… cease to exist.
And by the way, humans have gotten smarter.
Humans have been known to grow smarter as the years pass, knowing new stuffs, discovering things that were once impossible and inventing mind-blowing inventions.
Give a species like that centuries and they would be really smart.
Mars was a different place entirely. While it might be advanced in technology compared to Earth, it doesn't have the casual luxury that Earth has.
