1. Is anyone actually saying that traditional education is irrelevant? In particular, is Khan Academy (or Sal Khan personally) saying this? (I haven't heard it.)
2. Imagine that you're a possible user (or funder or ...) of KA, but you are not convinced that "traditional education is irrelevant" or that KA's variety of not-so-traditional education is going to be any good.
One thing you might look for, when evaluating KA, is whether the people who run it are any good by the standards you're used to. So even if the people operating KA thought that "traditional education is irrelevant" it might be eminently reasonable for them to parade their traditional-education qualifications, in order to help persuade those who aren't yet on board with the idea.
2. Imagine that you're a possible user (or funder or ...) of KA, but you are not convinced that "traditional education is irrelevant" or that KA's variety of not-so-traditional education is going to be any good.
One thing you might look for, when evaluating KA, is whether the people who run it are any good by the standards you're used to. So even if the people operating KA thought that "traditional education is irrelevant" it might be eminently reasonable for them to parade their traditional-education qualifications, in order to help persuade those who aren't yet on board with the idea.