@MoeBlee I was only pointing out how your language sounded, and would likely be interpreted by those reading. Normally one could reckon (vaguely) that "I dislike X" is more or less equivalent to "I think X is not okay." For example, "I dislike mustard" could be interpreted in context as "It is not okay for you to put mustard on my sandwich".
I will reply to only one specific point of what you wrote because I don't think there's much to be gained from continuing much further.
(1) I would have to find the right textbook, which could take more time than a google search
(2) I would have to find the relevant passage, which could take more time than hitting CTRL-F and searching by keyword
(3) I would have to retype the relevant passage, possibly with typesetting that takes a little extra time compared with just typing words. If there is a diagram involved this could pose special difficulty.
(4) The person on the other end might have difficulty verifying that I made a correct reference, or seeing the context of the passage I quoted.
In my opinion it is worth considering the value of one's time, and whether these considerations are worth the trouble when a Wikipedia article may have comparable quality (or inferior quality, but nevertheless sufficient) for the same purpose.
Regarding internet sites that are better written and edited than Wikipedia: my experience is that finding such sites can be difficult or next to impossible for certain topics. MathWorld frequently has good articles. If you have any resources you would like to share, please do.
EDIT: I did not see your most recent post until after I had submitted mine.
Regarding learning backwards through Wikipedia: I think this is somewhat to be expected, in the following sense. In order to stay concise, it is reasonable for a technical article to assume some prior knowledge. As such, the article is of more use as a reference to those who are knowledgeable, than as a tool for learning to those who are not knowledgeable. So trying to learn a complex subject through Wikipedia could be like trying to learn medicine by reading a Physician's Desk Reference rather than going to medical school and reading the required textbooks. There's a point at which trying to use something for a purpose it wasn't designed for simply becomes impractical. But for simpler cases it might work out okay.