Try it for any search term -- it's not just controversial topics that are "curated" to a small number of approved websites.
1. Type in a search term, note the total number of supposed search results (usually 10s or 100s of millions, or even over a billion!)
2. Try to navigate through them, keep clicking the last page. Somewhere around page 420, it will COMPLETELY GIVE OUT and say "Total results 422" or something. Even if you click "don't hide similar results; I want to see ALL results" you get the SAME result.
Conclusion: at some point, Google has fundamentally changed. You can no longer find "Joe's blog" on organic search. Do you know what a Potempkin village is? It's a fake village created for propaganda purposes. Or the fake wall around Truman's world in The Truman Show -- it LOOKS like a horizon stretching on for many miles, but in fact Truman is limited to X miles of water around his little fake town.
Google PRETENDS there are millions of pages indexed, but you won't get to 99.999% of them via Google! It's literally impossible. Not just difficult, they DON'T EXIST IN THEIR DATABASE ANYMORE. *maybe* they are there in some way, so you can type in site:cathinfo.com and get results. But it is literally impossible to get these results served up in normal Google search results, and that is BIG.
At some point, the old Internet died. Essentially, Google is curating content for every topic, like the old Yahoo search engine topics pages. Remember that? They had human moderators for every topic, and you had to apply to get your site on that page. It was a human-based directory of websites. That's what Google is now, only they PRETEND it's still this index of the whole Internet, a way to find things on ANY website, with near-infinite possibilities. NOT TRUE.