If you do not know of a single Wikipedia article that you judge to be politically biased, then that says more about you and your gullibility than it does about me.
The point is not that Wikipedia is completely unbiased. That's an obvious impossibility - for any encyclopedia.
The point is that accusations of "noticeable bias on any topic that has political implications" is the kind of accusation made by someone simply trying to sow distrust in information, writ large. It's increasingly common.
Which was why I just wanted to point out that while I think Wikipedia is a net good overall, it is not without blemishes.