I like how you were given an academic article going over how it's actually pretty accurate, which itself cites a paper that was published in Nature, and just decided to ignore it. The key thing, as always, is checking citations, which Wikipedia makes pretty easy to do.
There's tons of link rot in the Wikipedia citations though.
Yeah then you have to Google and try and figure out what they were citing and if you can't do that you really shouldn't be using it for an academic production in the first place. You always need to check the citations to make sure they're not being miscited.
That's just it, if this person is only telling us that he makes sure his students cite what Wikipedia is citing that's fine. I'd encourage that. But to tell students they shouldn't use Wikipedia at all is just asinine.