I think it's a fair criticism; or rather, an important limitation one needs to keep in mind. Wikipedia articles can miss out on a great deal of nuance and context, which can matter a great deal.
My favorite example of this is the debate between a faction that believes Lithobates is the proper genus of a certain set of frogs, and another faction that believes the correct genus is Rana. The Lithobates side is essentially one person along with his sock and/or meat puppets, so in the end, after many rounds of moderation, most of the species in question are listed under both genuses.