Some of them were indeed clueless. But also a bunch of them were great developers. I remember one who came from Flash and easily adopted the react.js SPA mindset without really understanding HTML/dom. For him almost never was it a practical problem, but it was interesting to see sometimes and he would have a completely different approach to the web. He for instance didn't understand at first why I wanted URL's to stay the same and meta title's to be correctly set. I don't have a principle problem with it. It's just an interesting development.