30 years ago there was no photoshop but great graphic designers and great designs/logos/ posters were still there, so yeah, you can be a great graphic designer even today without digital work. Ai/PS is just a tool, Design is about ideas which needs a good brain first. if you just know the tool but don’t have ideas we call such people operators and not designers.
Tools are hyped these days, good design is never tool dependent.
And even if its required, adobe tools are very easy to learn these days usingetc.