Run around naked - Many indigenous cultures did have some forms of clothing. And for those that didn't, they didn't see anything wrong with not being clothed.
Make tools out of not metal - And your point? Cultures of the past that made tools out of "not metal" seemed to do just fine with what they used them for.
Uh, many indigenous cultures cooked their food, too. Because they realised they didn't die so much if they ate that animal they were evolutionarily predisposed to killing cooked and not raw and full of germs, yum
Also we have built spaceships I am pretty sure we are beyond the "we are just animals like everything else" stage, yeah?
p.s. my cat doesn't like raw meat but LOVES cooked meat, despite her being a stray we found as a kitten! Even animals think you are dumb