It's not immune to it. If you are looking for something highly specific you will get slob for sure. To give an actual example, a buddy of mine told me that the walls of your house act like a sponge when you have the outer walls insulated but not the basement walls on the outside, at least against water. So I went looking on kagi for stuff to back that up (not that I didn't believe him, I just wanted to know more). A lot of the results were completely ai generated crap websites. There were good and somewhat relevant results, but in the end I gave up (also because we got confirmation that it's done on our house, so it became irrelevant).