That wasn’t what was in question, it was whether or not Twitter censored them, which they did. See the sibling comment to your post here for additional info from Twitter even on the topic. Even though they reversed the censorship, they _did_ do it.
That doesn’t make what they did okay — if anything it shows exactly how much power and influence they wielded in suppressing a news story at a critical point in informing people during an election cycle. That cannot be understated.