I don't really bother to contribute to any prominent pages on main Wikis, because in my experience it almost always required fighting with people with huge egos following arcane rules and procedures which they certainly took a lot of time to design and develop but which don't seem like productive use of my time, especially when people who designed them are going to fight me on every step.

There are some younger and less entrenched projects where one could make a difference without wasting time on BS (like Wikidata or Wiktionary) and there are less popular areas which aren't controlled by wikifeudals, but changing something otherwise requires too much effort for what it's worth, IMHO.

And yes, if there's any conflict of interest (usually political or ideological), the only thing you can trust is the links, and even those should be presumed to be selected in a biased manner. Of course, this also applies to any random article in 99.999% of the press, so it goes... It's still a valuable resource for topics not consumed with public controversy.