There's actually an, at least arguable, point in your first sentence before you get to the copyright infringement. And there's a whole round-robin of content (or just "facts") being lifted from Wikipedia to put on other sites and from other sites to be put on Wikipedia that's often hard to sort out.
There is a broader point that centralization of content being found by search engines isn't ideal--even if Wikipedia were more pristine than it is a lot of the time.
You're right twice. But when I see things on Wikipedia lifted from textbooks published before there was Wikipedia it's not hard to sort out.
As to your second point, I think the combined effect of Wikipedia and Google's popularity-based search ranking is hurting the web. It's not a conspiracy, just a result of the system.
There is a broader point that centralization of content being found by search engines isn't ideal--even if Wikipedia were more pristine than it is a lot of the time.