Absolutely, students and those producing serious work need to work in primary resources. The nature of Wikipedia, however, is that it does present some original material. Therefore using that material would need proper citation of Wikipedia. But if that summary or citation is based on external material one must credit the primary external source which should/must have been read and confirmed, as well.
In this sense Wikipedia is no different than the numerous works of David Barton which are quoted by numerous people expecting him to be an accurate source of American history. In real journalism or academic papers Barton must always be checked which is very hard because he rarely provides professional notes and yet publishes numerous inaccuracies about the Founding Fathers and the Framers of the Constitution. So I teach my students to cite Wikipedia but tell me if they are accurate or not by demonstrating it from primary sources.
Sometimes the creators of Wikipedia articles just make a point in a way worth using but primary source work is critical.