Except, there's a difference when you're in a room with somebody who can tell when the shitty site or the vague nature of a question makes it difficult to complete the request. They can also better gauge someone's understanding of subject matter, merely by talking through the question, approach, etc.

The availability of these sites makes it seem like it's a standard, which adds to the problem. Some small company might not have taken that approach. Now, you don't want to fall behind by not making use of a widely-accepted "standard" practice.