Exactly. All censorship could be a violation of 1A. The bar is high on this one. The government has to jump through difficult hoops to legally suppress most speech. The courts have long since ruled against the “but they have other channels” argument that you propose.

As for the latter point, again you miss the legal argument. The government is targeting a company, and not conduct. That could easily be a Due Process violation.

Of course we don’t know. The courts will rule. But what you wrote ignores basic legal precedent.