To all those down-voting, I'm sorry but am I to believe n=20 studies when there's a huge replication crisis or hundreds of people who took the risk, tested it o

To all those down-voting, I'm sorry but am I to believe n=20 studies when there's a huge replication crisis or hundreds of people who took the risk, tested it on their own and reported on it? I'm not saying studies are useless but just basing your beliefs on small studies like this is crazy to me.