It broadly depends on the resource. We want to avoid 'seeding' the site with general questions that are more than sufficiently answered elsewhere. We definitely want to avoid answers that mostly cite an external resource with a link to learn more.
Wikipedia articles can be very difficult to read for a lay person, especially for more advanced topics. Try to teach when answering these types of questions, bring something more to your answer than what exists out in the wild. Also, make sure the majority of your post is written by you; it's fine to include some references but your answer should be your own creation.
In short, avoid asking questions that are easily found and answered elsewhere just for the sake of getting content into the site. If a new person arrives and asks one of these, nail that question with fantastic answers that show the depth and craft of this community.
I'd try that for a while, and see how it goes. If extremely basic questions that don't really need yet another iteration of answering become a problem, we can address it then.
For expert level questions, I think it's worth the effort to see if you can produce something much better than the typical references that folks would find. That might not always be possible, but it's definitely a good goal to keep in mind.