Dunning Krueger Effect is an excellent example of bullshit science and people accepting things that sound right instead of rigorously checking.
Read more here https://www.mcgill.ca/oss/article/critical-thinking/dunning-kruger-effect-probably-not-real
Edit: another source, perhaps more appropriate as a source: https://www.psychologytoday.com/us/blog/how-do-you-know/202012/dunning-kruger-isnt-real