The wikipedia one seems nuts to me. Like you literally can cross-check the sources if you think it is making a wrong claim.
People are quick to say "but everyone can modify it!" as if claims made by other souces arent made by basically random guys as well.
I also think its important to note the thing that wikipedia itself has an article about, which is that it is an encyclopedia.
You wouldn't cite the encyclopedia in a scientific paper, or even a university hand-in. It's just bad praxis. However, you would absolutely check the encyclopedia if you wanted to quickly gain a basis of knowledge on a topic.