But wrong is still wrong and wrong is not useful. And even thou I know its wrong I have no way to fix it despite the idea of Wikipedia that anyone could correct everything. But I can't because I would need to find an article (from an accepted source) which opposes this exact claim. And even then if there are 5 sources for something that is wrong and 1 source pointing out that it is wrong, Wikipedia will at best report this as neutral as it gets which boils down to "The majority says [insert wrong statement here]". This IS neutral and in it self correct but the wrong statement is still there anyway. This is just the fundamental way how Wikipedia works.
And if the consensus is particularly bad on a subject and the people editing the Wikipedia page are cooperative, they'll usually be able to find a rule intepretation that allows the consensus statements not to count (for insatnce, claiming that a generally reliable source isn't reliable for this particular statement).