The idea that anybody and everybody can write, review, and correct factual articles isn't democratic.

It's idiotic.

Wikipedia is useful if you're a skeptic who's able to identify and check more reliable sources. Otherwise it's a very appealing trap. Students love it.

Many articles seem to be quite accurate and informative, but the fact that anybody can add or delete anything at any time means you can't even trust those.

I've made carefully explained corrections in several places. On one or two occasions they were soon removed (for no stated reason) and the original errors reintroduced by (I assume) the original "contributors."