Except w hormones smaller differences make bigger deals than with psychoactive drugs. And that’s saying something cause meth and adderall are one CH3 away from being the same. I study this type of stuff (drugs and effect on body or neuropsychopharmacology if you want to be fancy).

If y’all want more info look up balco by American scandal. It’s a top tier podcast about how peds are actually still supper common

Ya but hundreds on a galactic scale is a very small handful it’s .000000001% of the stellar systems in the universe . As for the travel thing I agree that’s why I emphasized a civ that doesn’t have beyond light speed capabilities

But that’s only a handful of stars. Statistically they probably won’t be

The big problem with this for me is what ever technological signature we do see is thousands to millions to billions of light years away. So that civilization has either collapsed or advanced a terrifying amount. If some advanced tech that hasn’t discovered how to see faster than light looked at earth they would see the beginning of the dark ages