If there is misinformation on Wikipedia it can be corrected. Unless you are claiming that all hits for "misinformation doctor" are incorrect, a few examples to verify and correct would be helpful.
Some 'misinformation' is hard to correct because the corrections are reversed by those who are intent on spreading the 'misinformation'. This is especially prevalent around contentious and/or politically sensitive subjects like the mentioned SARS2-related cases. This is what makes it hard to trust articles on such subjects on Wikipedia.
"If there is misinformation on Wikipedia it can be corrected."
It depends on its nature.