No, it's completely on-topic! These bootcamps are not teaching these people how to be effective developers when they skip the "hard stuff" and bring in the lowest common idiom in lieu of that. It's so difficult to try and re-teach people this exact concept--try explaining to someone who knows nothing but jQuery and AJAX that a promise has nothing to do with fetching data.
Sure, our UX/UI guy does "AJAX" to create working prototypes of his designs before handing it off to be stuffed into React / Ionic / WhateverJS (which is quickly becoming the standard requirement for a UX person), so it's not obsolete tech by any standard. But let's not act like "boutique" web dev shops are actually still a thing... stay relevant people, especially if you're paying those sorts of fees to show up and learn how to build an Angular2 app on headless Rails in 2017.
Sure, our UX/UI guy does "AJAX" to create working prototypes of his designs before handing it off to be stuffed into React / Ionic / WhateverJS (which is quickly becoming the standard requirement for a UX person), so it's not obsolete tech by any standard. But let's not act like "boutique" web dev shops are actually still a thing... stay relevant people, especially if you're paying those sorts of fees to show up and learn how to build an Angular2 app on headless Rails in 2017.