[Someone]

"The key to being a good developer is to be able to find your answer as quickly as possible without learning anything else."

I 100% agree. That's why I often spend some extra time to sharpen my 'good solution for my problem' detection skills.

Even reputable sites such as Stack Overflow have plenty of bad answers, and that is even ignoring the fact that an answer may be good in general, but not for my situation.

Site quality also decays because software is changing/improving all the time. That answer to your question may have 700 upvotes, but if its solution has made meanwhile it into the standard library, it really helps if you know that.