Search is the most important application of AI inside Google. It's the raison d'être for data collection. So why the search quality decreases? My current hypot

Search is the most important application of AI inside Google. It's the raison d'être for data collection. So why the search quality decreases? My current hypothesis is: Users who click ads and generate ad revenue like this garbage. Google learns to serve this outlier group of users. Killing the experience for everyone else is just a side effect.