It is 100% a safety valve. Humans have an inherent negativity/risk-aversion bias. Those who didn’t were weeded out of the gene pool. If someone comes up to you

It is 100% a safety valve. Humans have an inherent negativity/risk-aversion bias. Those who didn’t were weeded out of the gene pool. If someone comes up to you with a crazy sounding idea it is far more likely that they are wrong and you shouldn’t trust them. It’s one reason why obvious seeming innovations take so long to become widespread.