It actually makes very good sense to do this from a "fair and balanced" point of view.
"Section 230" is what gives forum hosting providers like Twitter immunity from prosecution from, say, libel suits, as long as what they publish is solely user-supplied content.
But Twitter has been doing an awful lot of "selective" removal of certain points of view in recent months.
Which suggests they want to waive their immunity under 230. Or at least don't care enough about it to be careful.
There is already some old (by now) case law which says that if a provider controls what content it publishes, i.e. decides what content can and cannot be posted, they then assume liability for that content, and at the same time jeopardize their immunity under Section 230.
The reasoning for that is very simple: if the provider is deciding what the content can be, then they are really publishing their own opinions, and not just raw user-provided content anymore.
If Twitter wants to take political sides, as it demonstrably has, and regardless of what side it takes, it's going to end up without 230 protection.
And just watch the lawsuits start to roll in.