I think it's because people have grown up with or are the people who were lied to by the smart people with credentials. And now that a lot of that information has been disproved, don't trust the system. If you've tasted the credentials system, it's known that a lot of that is nepo, wealth, political, etc., it casts a doubt on everything. Now you have to weed through everything to find out if it's right regardless of credentials. Who do you trust? Also, new information comes along and theories change, so who's to say that those theories are going to stick around. Basically, it's complicated.