First is that "Reality has a well-known liberal bias". Which means lots of people want a "neutral point of view" which reflects their own opinion.
Secondly, there are lots of trolls and bad-faith actors. So a bureaucracy needs to be built up to deal with it in a structured and consistent (not necessarily fair) way.
Thirdly, what can incentivise people? Most editors aren't paid. Introducing money just leads to corruption. So you end up with fake Internet points which can be gamed.
Penultimately, can you appeal? I've had changes reverted, appealed, and reinstated. You can go all the way up the bureaucracy if you want to break out of the echo chamber.
Finally, fork it. If you think you have a better way of doing things - and can't make internal changes - go run your own Wiki and see how long your system lasts without falling to bias.