Biden has not, to the best of my knowledge, said anything that could sanely be considered incitement to violence. Banning him would not be in the same category as banning Trump. It would be much more blatantly political, because the excuse would be much more transparent.
Are we to just ban politics from these platforms wholesale?
Is lying against Twitter's TOS? If so, then you have a sensible point. But I kind of doubt that it is...
You may not use our Products to do or share anything:
* That is unlawful, misleading, discriminatory or fraudulent.
Here's an entire section from Facebook regarding "False News"[2].Joe Biden's rhetoric regarding the Georgia State voting laws is clearly 2-3 of those. Why has he not been banned yet?
And the incitement of violence thing has been debunked pretty clearly. If one guy at Twitter can decide something was inciteful just because that's their opinion - despite all evidence presented during Congressional Hearings, then we're far more lost than previously assumed.