Canon is not important.
It's all just fiction. Pick and choose the parts you like, ignore the rest.
Goes double when crafting characters and campaigns.
To an extent. If a player walks up to my table and says, "My character is the last Ithorian, because the Empire destroyed Ithor right before the Battle of Yavin and now I want revenge, and also I'm a Jedi because all Ithorians are Jedi," I would probably say no. When asked for a reason, I can point to canon and say, "look, there's Ithorians all the time. This galaxy is the one I've chosen to set my story in." If there is an established canon with firm details and events, that player is less likely to think I'm denying his creative agency and more likely to see my reasoning for saying no.
This is why Canon is important to a game-master.
It's not why it's important to star wars fans, though.
But yeah ![]()