Wikipedia is released under creative commons. That is literally the worst example you could have picked.

It isn't, though. The Creative Commons license says "you can use this content", it doesn't say "you are forbidden from assisting the creator of this content in any way".

Creative Commons is great because it allows everyone to use it. But a company the size and stature of Google should consider it a bare minimum, not a target.

Well, what you can do and what's fair and friendly are not always the same thing. For example, although I have to pay taxes to the government but not to charities, I may use a charity as an example of somewhere to give money to.

If you search for questions like "how long should I bake a frozen chicken thigh?" you'll get chunks of text from Web pages which are not CC-licensed.

This might not be a great example, either.

Most cooking web sites tag their HTML with things like itemprop="recipeIngredient", and itemprop="recipeInstructions", hoping to get featured by Google in this way.