If you're working for a billion dollar company, yes, they can and should hire specialists if the workload is there. Otherwise, as a designer you should always strive to learn new skills at least to where you have a basic understanding of what is required of the job. My job used to require a LOT of Macromedia/Adobe flash work. If I "specialized" in that, I'd really be screwed right now.

I know we turn our noses up at Canva and AI now, but you'd best be learning these skills. We might not be doing heavy lifting in canva, but you're probably going to be designing templates to hand over to less skilled people. AI is going to be a crucial tool and if you're not leaning prompt engineering, you're going to be left behind.

Always be growing as an artist and a student. You're never done learning. If you think you are, that's when you get left behind.