Perfect it ain't, I never even heard anybody actually relevant state that, by the core principle of it it can't be.

But, its by far the best human-averaged source of info on most topics. I'd say even politically charged topics, definitely much better than most news out there who always show some clear bias.

Its not exhaustive (another common complain form folks who seek visibility by complaining and denigrating stuff for the heck of it or some immature popularity), its not meant to be. You also don't do postgrad level physics studies from Encyclopædia Britannica, do you, but it may give you some shallow introduction to orientate in the field a bit.