OP is weakly executed, but good in theory. Let’s look at the original quote:
For many people born in the 70s and 80s, their first exposure to Sir Alec Guinness was his role in Star Wars. Often times, our first impression of an actor sticks - he did a fine enough job to be iconic as Obi-Wan Kenobi, so folks (such as myself) will always best remember him for that role despite having seen him in other films.
Does that make one “culturally illiterate”? No, it just means a strong first impression can stick.
Also: fuck.