This wasn’t always true, when software was less replaceable and felt more valuable. Part of this cake from the fact that software distribution was more difficult. If you ever have purchased a compiler for example you might find yourself interested in everything you can learn about it from the manual.
Now developers are trigger-happy Googlers looking for the single salient example atop StackOverflow answers.
2-3 good examples are what joe blow is looking for when he types "man", and he rarely gets them.