This isn't their first rodeo. In 2008 Google launched Knol, which was a fairly major initiative to provide a service like Wikipedia, but without Wikipedia's problems around unattributed content. The idea was that authors would post with their professional affiliation, and get compensated with ad revenue. They hoped to attract actual medical professionals, as medicine was one of the areas where you want to be able to rely on the information.

It failed miserably. The incentives were favorable to spammers but not to actual professionals. No real expert would invest their time into the platform, putting their reputation on the line, for a few paltry ad dollars. But there were some people who mastered cranking out low quality content.

I'm not making any claims about the new effort, just pointing out that identifying a problem and putting resources behind a solution is often not enough.