Because anyone can edit the articles/content on their pedia, even if you do some projects based on it then they might not get approved anywhere.
It is called Community (https://en.wikipedia.org/wiki/Community).
Wikipedia is a community for Knowledge.
You need to trust people to grow, that's how it works.
Wikipedia is not crap, is you that are grumpy.
Best regards.
He think everything is crap except his own point of view
People with very low intelligence usually think that way.