I could interject all sorts of other expertise that I must use on a daily basis, where my lack of knowledge of such would render me unemployed. My skill set has evolved into what someone might call a designineer. Do I think everyone has to be a hybrid designer/developer to get the job done? Of course not. However, I wouldn't gather those skills and conflate that my skill set is necessary to getting the job done for someone else.
It reminds me of the purist argument, where the evangelist will protest against web fonts, frameworks and the like. In 2001, if you were using CSS or JS you were not a purist. We can see that labels like these are to serve a purpose and it seems to be little more than an exercise in pedantry.
At the end of the day, it's about providing quality work and getting the respect you deserve for your work.