"We" refers to our fishy forebear, who bears the name Tiktaalik. (1)
Once upon a time there were really big fish, heavily-armored fish and there was Tiktaalik, smaller, slower and, in general, more vulnerable.
If you accept that humans (and virtually all four-limbed creatures) evolved from Tiktaalik and, like me, suspect that this assumption is approximately true, you'll accept that at some point, Great (to the umpteenth power) Grandfather or Grandmother Fish was able to inch itself out of the water and that, over eons of time, its fins became limbs and so forth, you may also be willing to accept my theory that fear followed by positive reinforcement might be the propellant.
Even responsible journalists don't pay attention to the Sage of Omaha--sure, they faithfully write his words, but the next day they foment panic, by screaming in headlines: "The Sky is Falling, The Sky is Falling!" In the beginning, did every Tiktaalik do the same thing?
I'd bet they had "Aha!" moments, just like Tiktaalik did.
If one is a Tiktaalik, it's better to avoid the predators.