The contents of Hunter's laptop didn't stop me from voting for Biden, but that's because I'm a cynical jerk that already thinks politicians are corrupt by default.
How about this: you don't get to decide what's remotely important to people in the context of the election?
"The Hunter Biden story is insignificant" is a judgement, not a fact, it's a judgement. I'd say that calling it "misinformation" is bizarre, except that most prominent allegations of misinformation boil down to judgements too.
Twitter's actions almost guaranteed that this would blow up, prompting the wider media ecosystem to respond to the story about the blocked tweet, letting many, many more people know about the laptop story (which anyone/everyone could still read without hindrance) to people (like me) who don't read the Post or use Twitter.
In fact, had Twitter not flagged the NY Post's tweet about the article, I might never have heard about the laptop story at all.