First of all, we're not even talking about the censoring of terrorists, dictators, and extremist groups, which Twitter actually has allowed to persist on the platform in the past (e.g. Nicolas Maduro and ISIL). The current censorship at hand is a mainstream news outlet being blocked from releasing a damaging political story less than 2 weeks before the election. This is banana republic-type corruption.
Secondly, Twitter primarily serves content to those people who want it. It's what their algorithms are trained to do. The argument that the New York Post's article is disturbing and thus should be removed is easily used to justify any amount of authoritarian social manipulation. After all, everyone's actions eventually affect me, so I should be able to control all aspects of how they think, right?