> Building stuff

Oh, absolutely one should build much stuff. Just don't get stuck in the own, in all likelyhood shitty, bubble.

> Experts

You made it sound fatalistic tho, as there were no use in even trying to identify experts. If you have difficulties telling experts from wanna-be experts, that is your problem, not the problem of beginners.

You also don't have to be an expert to recognize an expert. The level of competence needed is way lower than that. The level of social skills needed to recognize the different schools and camps is high tho. But this is rather a social problem than a domain-specific one.