The definition of a preprint is that it isn't peer reviewed. Unless you're an expert in the field, you IMHO shouldn't be looking at preprints. Might be OK if they come recommended by multiple unaffiliated experts (i.e. kinda half reviewed), but definitely not by default.

I agree, but the public and media outlets don't practice this either: https://news.ycombinator.com/item?id=47716699