Earlier quoted context omitted.
I don't see that the link to Wikipedia is not "citing the people who wrote the stuff you're using". When you cite a scientific paper, you give the primary author (or few) and an "et al.", you don't list out everyone who contributed to the paper - you're still crediting them all and if people care, they can go look up the rest.
OK, I'm not really sure what the relevance of this is. I was just responding to this: "...am I expected to cite every contributor? That doesn't seem reasonable." And saying how it sounds pretty reasonable to me. If you say that a Wikipedia link counts as a cite then that just makes it even more reasonable.
I had interpreted your statement above as "Oh, of course go ahead and include a link to Wikipedia - they deserve credit too - but still redundantly list out every contributor to the Wikipedia page". This is because above, I think with the "...am I expected to cite every contributor? That doesn't seem reasonable." the author had in mind enumeration, not simple reference.