Yes, it's true, I never said that everything you can find on Wikipedia is 100% true, but sometimes it's a good starting point to get a general idea if you don't have a clue about a topic and figure out what to look for. And you can't cite Wikipedia articles in your research papers. Wikipedia articles are not reviewed in any way. No journal would accept them for publication. And you want to publish your article in the journal with the highest possible IF, so citing wikipedia would be like wtf?