Well, was. They did a bad job of it these last few years which allowed any AI that could crawl the web to seem amazing for search because it could pick the best posts from Reddit or whatever other forum had the best context for your question, but now we're watching the AI snake eat its own tail.
I rarely use image search, but I went to look something up recently and I was shocked at how many obviously AI generated images showed up. I couldn't even find an image of the thing I was looking for and eventually gave up. Bing has the same problem.
Hard to conclusively beat spam when your primary means of making money is selling the very ads that the spammers are using to make money.