While this is true, the majority of the wikis are not at all low quality. Some are the only ones existing for a topic. The wikis are community-based, after all.

But its easy to vandalize and is highly profit-driven. The fandom wikis are filled with ads that absolutely destroy navigation. Infamous is the video ad that scrolls you up automatically in the middle of reading once it finishes. You have to pause it to read the article with no interruption.