There really is a different between being able to evaluate and implement designs and being able to build and connect functionality to the backend.
Specialising in a11y, i18n, CSS, etc. is a whole other ball game compared to hooking up interactive functions to APIs.
But I’m not a designer who knows how to code, I am a design engineer. My brain very much tends towards things like design systems, reusability, reducing repetition. Not to say I’m a crazy capitalist, who’s after productivity at all costs, not at all. I just want to reduce or remove the menial work that we have to do, we are amazing creative creatures, so we shouldn’t have to do that kind of work.