Yes. :) Sound engineering judgment typically implies a good understanding of the full context of the problem ("is this a good tradeoff?"), which often involves

Yes. :) Sound engineering judgment typically implies a good understanding of the full context of the problem ("is this a good tradeoff?"), which often involves things beyond the merely technical. And without all of the other things you mention, which are definitely in the category normally called "soft skills," the best engineering judgment in the world will go to waste.