You suggest that it's important for junior tech professionals to try and answer their own questions with, e.g., Google. But I feel like every other month I see somebody talking about all the bad habits developed by people who trust W3Schools as a credible resource because they're highly ranked on Google.

The junior professionals who most frequently need to find quick answers for straightforward questions are the same people who are the least well-equipped to identify which answers are credible and appropriate. It's a paradox of finding trustworthy information without consulting the only sources you know to be trustworthy, and as someone new to the field myself, I lose sleep over this stuff.