I think the idea is that you won't even leave the Google page at all, they want to keep you on their site and serve you their ads instead of sending you to someone else's site and giving someone else that sweet sweet ad revenue.
It's the same playbook as ever. Doubt can only be explained by ignorance, failure can only be explained by under-committing,
The only way to have a "valid" opinion is to have already bought-in and be actively selling other people on it. It's the same mentality as a cult or a pyramid scheme.
It’s become more efficient to get basic info on virtually any topic by just asking an LLM like ChatGPT and that could be a serious threat to Google Search. People might form the habit of asking AIs for everything and then go to Google Search only when they want to dig deeper / find relevant articles etc. So I assume they added their own AI right into Search in an effort to continue being the first (and perhaps only) place one goes to for information.