It seems like a lot of this is just the tension between what management wants to be focusing on (big picture product or business-level questions) vs what it makes sense for individual engineers to be focusing their efforts on. As an individual contributor, it's vitally important to keep up with new technologies in order to remain employable. Maybe that isn't in fact the best strategy for your current job, but it's cr…
If it's vitally important to keep up with new technologies in order to remain employable why are the 7 most employable programming languages (C,C++,Java,PHP,JS,Ruby,Python) at least 25 years old? The job market says the opposite - that new programming languages hardly get a look-in.
Good luck getting a Javascript job if all you know is jQuery, and you've never touched Webpack/React/whatever else JS devs need these days. Maybe JS is an extreme case, but some version of that same phenomenon exists for all the languages you mentioned.