Search felt good enough at some point. It no longer does, at least for me. I don't know if my expectations have become too high, or if search engines have become worse, though.
Maybe it's just that other knowledge areas don't just put every little thing on the web to be indexed and easily searched, or maybe I just grock programming well enough to read between the lines and follow implications, I don't know.
Finding how/why the lighting switch on a gas stove could cause a (mild) electric shock. I read the first 3/4 pages of results, got one or two very low quality forum postings and that is all. Somebody in the world must have written about this problem, e.g. in a manual for gas repair engineers. Google didn't find it.
Where wild ducklings sleep at night. I found lots of articles about how to look after pet ducklings, which aren't relevant. I found one article about how wild adult ducks sleep at night, although it was in my view of dubious provenance. Nothing about wild ducklings. I spent only a few minutes searching as I was using my mobile phone (in a park), so had higher needs for finding the answer in the first few results than the above.
I suspect that people get different experiences of google according to: a) what kinds of knowledge they tend to search for, b) their skill at using it.
I increasingly find myself using Quora, and asking new questions on it, for the kinds of queries above.
Also, I think these types of queries (people, places, things) rarely trigger ads. Based on the example queries from the post (Taj Mahal, Marie Curie, Matt Groening) there are no ads at all.
Fortunately, white-hat SEO is very easy to describe without mentioning search engines at all: copy editing, fact checking, designing for accessibility, and so on are valuable skills regardless of what algorithms search engines happen to use for ranking today. Write content for your users and you don't have to worry about optimizing for search engines.
Find all blogs of motorcycle journies 50 km nearby my current position.