I don't see social media trying to stifle views they don't like. They are trying not to participate in disseminating false statements of fact that are harmful to the public. Before the internet that was done by news organizations. It was done voluntarily, and in most cases, with few notable exceptions, continues. It is done for a variety of reasons, such as not wanting to alienate one's customers or wanting to avoid legal liability.
With the internet, Congress in its wisdom exempted internet site owners from liability for third-party content, including defamatory content. But internet site owners can still be legally liable for harm caused by information disseminated on their sites that they know about, and which a reasonable person would conclude could cause harm to members of the public or the public at large, in countries other than the U.S. And they still have a business interest in not being party to disseminating material that is harmful to the public. They are not doing anything that legitimate news organizations do not already do. U.S. law (also recognized in the USMCA trade agreement) protects them from liability for removing third-party content that the site owner considers harmful to the public interest.
The owners of the social media outlets - Twitter, Facebook - were forbidding people to state the allegations against the Bidens. The allegations. Merely mentioning the story, re-tweeting the NY Post story about the allegations - was not allowed. And the NY Post wasn't allowed to tweet their reports.
Nobody thinks (I don't think?) that if these allegations involved Donald Trump, Jr. and his father - either now or five years ago - that they would have suppressed the story. Do you? We've heard all sorts of allegations about Trump for the past four years. None were suppressed.
Yes, they have the right to ban whatever subject matter is being disseminated under whatever rationale. But to argue that this is simply them trying to prevent "false" information from being disseminated is, I think, missing the concern. If you don't think there isn't a ideological or political bias in their determinations then I have to disagree.
And for what it's worth, I voted for Biden.