What else could “at some point we limit your freedom of expression” possibly mean?

Yes, such a coherent argument: "no one is trying to restrict your speech, and if they were it would be good actually."

There are people who just can't admit to themselves they actually hate free speech. Because they're people who've never needed it. They've never been abolitionists speaking against slavery, or civil rights leaders speaking against apartheid - whether in South Africa or the American South. They've never been gay people fighting for equality, or trans people fighting to survive. They've never been an unfavoured minority - ethnic, religious, sexual, linguistic, what have you. They don't need free speech, so why should you? Everyone else already has all the rights that they could possibly want or need, so as far as they're concerned, all these people are needlessly disruptive to the public order. So they maintain a fiction of collectivism, in reality a majoritarian hegemony, while silencing anyone who'd speak out against it. They can't quite bring themselves to say they oppose free speech, but they act in practice to undermine it.

It is a contemptible stance.

Somewhere out there is a young lesbian in Russia finding her people on social media, a young atheist in Saudi Arabia making friends online. And the majority is as ever ready to throw the most vulnerable under the bus, so that they, the majority, don't need to take a modicum of responsibility for their own idle doomscrolling. And if they need to whip up a moral panic to do so, fine. More efficient that way, helps override people's rationality.