Yes, but in my experience, this applies more to people than to some of the topics discussed in the article. I think you'd be hard pressed to find a city, town, village or hamlet in the US without a wikipedia page (as an example, take a look at Jack Wade, Alaska [1]), for example. And I don't imagine that rare moth species articles get taken down. But you have to have some kind of policy in place so that every individual on the planet doesn't have a wikipedia page.

[1] On Google maps view, i can't maybe 8 houses there? https://www.google.com/maps/place/Jack+Wade,+AK+99732/@64.15.... But it's on wikipedia here: https://en.wikipedia.org/wiki/Jack_Wade,_Alaska