On some topics it's nearly impossible: - medicine - cosmetics - cooking/nutrition/recipes
For many other topics, it's only really possible by finding forums where people who are not blog spammer discuss things. This used to be possible by appending "reddit" to a search term, but this is getting harder as Reddit's quality is decreasing.
I recently wanted to understand better the position of the rising and setting sun, and it did an excellent job of explaining where my mental model of the sun was inaccurate.
I'm not really sure that test tells you anything about the state of the web in general, and less the state of the internet, other than (perhaps) how good one site is at one specific query.
Plus you've picked categories (medicine, cosmetics, nutrition) which are rife with commercial interests, endless fringe theories, and plenty of "bad science". And, to be honest, the searches I've done for recipes over the past few years have all been very successful. But hey, maybe I'm lucky.