Bad information is inherently better for Google than correct information. If you get the correct information you only do one search. If you get bad, or misleading information that requires you to perform more searches that it is definitely better for Google.
That makes sense, poor search results lead to more engagement. That is devious.. Now that you've pointed it out I can't unsee it.
In same cases, lower quality of search results leads to more ad clicks and thus more revenue.
Perverse incentive structure
This is a variation of the parable of the broken window. It is addressed in what may be the most influential essay in modern economics, "That Which is Seen, and That Which is Not Seen."
https://en.wikipedia.org/wiki/Parable_of_the_broken_window