"The best outcome" doesn't mean the best life theoretically possible, it means the best life you can achieve for yourself in the life that you have. You do not have access to infinite information about how to live a good life. You have access to a limited amount of knowledge gained scientifically, an even more limited amount of your personal lived experience, and a vast trove of traditional wisdom. Given that limited knowledge, OP asserts that the best outcomes are achieved by paying heed to traditional wisdom.

There are certainly better ways to live than the ones handed down to us over millennia, and I think we ought to fine-tune what we've been given and learn from other cultures' traditions. But discarding everything our ancestors have given us because we think we know better is sheer arrogance.