There's a counter argument to this (I'm not saying I agree with it) but it's those extra hours it took to solve something on your own vs. the seconds (or at most minutes) to ask the right person. Of course the article does a good job to point out those seconds aren't free either... but I've had managers make a point of saying "if the problem can be solved by asking the right person than do it" that there should never be a reason to solve the same problem twice.