Well, it protects some. It makes the Biden administration somewhat less likely to ask, because there's a public rebuke from the courts, and if they keep doing it anyway, they are likely to lose any further court cases around it. So they have some deterrent - not perfect, but more than zero.
From the company's side, they have some indication that they are likely to be backed by the courts if it comes to that, so they have some more confidence in telling the administration to get lost - not perfect, but more than none. (They're not going to be less willing to say no after this court ruling.)
So, yes, the Biden administration could keep going. But that's unlikely to play well, either in the courts or in the press. The Biden administration is not a dictatorial regime; they face an election in 14 months. That gives them more incentive to "control the narrative", true, but it also gives them incentive to not be visibly seen as bullying the social media.
From the company's side, they have some indication that they are likely to be backed by the courts if it comes to that, so they have some more confidence in telling the administration to get lost - not perfect, but more than none. (They're not going to be less willing to say no after this court ruling.)
So, yes, the Biden administration could keep going. But that's unlikely to play well, either in the courts or in the press. The Biden administration is not a dictatorial regime; they face an election in 14 months. That gives them more incentive to "control the narrative", true, but it also gives them incentive to not be visibly seen as bullying the social media.