I have mixed opinions on recipes. The recipes that do show up are generally not great and seem to be there because of seo. And seo is really ruining the recipes pages them selves (extra content, misleading cook times) At the same time I don't really expect google searches to be a curator of good recipes. There is to much taste involved I think. But reputable site like serious eats almost never show up in results unless I search for it.
Health is a big topic, but health has been full of snake oils salesmens forever too, so its not surprising. You should probably talk with a doctor in most cases anyway?
Going on google for anything related to illegal drug use is a pita, it just brings you too like addiction sites and other useless info ime.
I also don't think that people are creating websites anymore? Where is there supposed to be info for the search engine to crawl? All real user content is on reddit, instagram, twitter and youtube. Maybe medium sometimes. All of that is easier for people to set up but not really set up for search engine to include as a good result. Instagram and twitter are especially bad, black holes of information.
For better or for worse, I usually use google to search to search reddit, then i can at least get some better starting point and return back to google with better terms. I don't really like this because reddit is a bit of a echo chamber.
Ive also stopped trusting searches in fields Im not familiar with because I know how bad the results are in fields I am familiar with. But i don't really know where else to go.