You paint Wikipedia as being generally accurate. It is not. In the area of radio stations, my calculation is that about 75% or a bit over are inaccurate, missing details at best and just wrong at worst.
I only said that its design was unflawed and that it properly facilitated [the enforcement of] citing reliable sources for all statements of fact, giving it the ability to function as an invaluable source for verifiable knowledge. People who don't follow those standards, or vandals who even abuse the openness of the editing system to add things like "they need to change the format back because I hate the new one," don't disqualify Wikipedia of its value or viability according to my way of thinking. Those are consequences of Wikipedia existing outside the metaphorical gated community of private encyclopediadom -- i.e., expect to see occasional graffiti along the roads you drive, and occasional cases of poor pothole maintenance.
My defense of Wikipedia was simply a glass half full one: that something with imperfections shouldn't be abandoned and thrown out with the bathwater so hastily and scornfully, but rather, that those imperfections should be seen as opportunities for improvement by
you, the educated and factually-minded reader, when you encounter them. Wikipedia's design often yields excellence article quality-wise in cases of sufficiently popular articles where enough eyeballs are constantly reading and tweaking their text, including adding/improving citations and flagging/removing unverifiable claims. The fact outdated information appears in seldom-visited articles on topics like AM and FM radio stations -- which everyone here regularly acknowledges are dying out of the public's consciousness -- isn't a deign flaw to me, but a symptom that the site needs more people to care for it. If you're an expert in a subject whose articles are inordinately outdated, be the guy whose edits right that wrong.

To do otherwise is to cause a kind of reverse tragedy of the commons.
As far as the biases many of the site's articles suffer, well, that's an admitted dilemma. So I'll just direct you to Scott Beach's Religion & Politics as my official take on it. With some things in life, one's mental threshing combine just needs to be engaged at all times. You can't even trust mainstream publications and media for coverage of subjects like those most of the time anymore.
Anyway, I just wanted to defend the site because I believe it has more value, and does more good, than harm. No privately-edited encyclopedia would ever offer even 1/5 of the article subjects Wikipedia does, especially at the complexity of detail it frequently rises to. It would be a real loss if it ever folded up because of this fad of deriding it that I see in so many places today finally driving it out of fashion, and ultimately existence.
If this makes me an annoying optimist, I'll live with the label.