It's only when a subject becomes popular that the propaganda gets recognized and rectified.
A lot of wiki pages about smaller companies only list the good things (fundraising, tech, etc.) and omit any controversies. The deliberate omissions due to bias are even more insidious than weasel words or other forms of poor journalism.
Fwiw I truly believe in Wikipedia and donate every year, but calling it "perfect" would be extremely dangerous (and false!)
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.