"Popper was kind of an egocentric jerk." Oh, the staggering irony of responding to the charge that philosophers don't produce anything worthwhile with an ad hominem. Res ipsa loquitur.
You missed the "Nope, see above." part right before your quote.
(The other argument was also mostly bogus IMHO, but making that case would take a lot longer.)
UPDATE: actually, I've changed my mind. The other argument can also be dispensed with rather quickly:
"Only the philosophers always make a good choice, because the ultimate thing they study, at the end, is the Form of the Good itself. Philosophy, in its purest form, contains the study of what it is to live a good human life. As Socrates said, the unexamined life is not worth living for a human being."
And what if, after decades of study, you come to the realization that Socrates was wrong and you have actually wasted your life? What if "the good life" actually involves not worrying so much about what is "the good life" and just getting on with it, going to baseball games, hiking in the woods, building a shed in the back yard?