It’s mostly about the government not arresting you for what you say. It doesn’t protect you from the consequences of saying hateful things in a public space. Say something racist in an area largely populated by the race you’re talking about and you’re likely to get kicked, post some right wing misinformation in an online space that is largely left-leaning and you’re likely to have your post deleted. Neither of those things infringe on anyone’s right to free speech because other people also have the right to not want to listen to Nazis or racists or TERFS etc.
Free speech has always had limits.
It’s mostly about the government not arresting you for what you say. It doesn’t protect you from the consequences of saying hateful things in a public space. Say something racist in an area largely populated by the race you’re talking about and you’re likely to get kicked, post some right wing misinformation in an online space that is largely left-leaning and you’re likely to have your post deleted. Neither of those things infringe on anyone’s right to free speech because other people also have the right to not want to listen to Nazis or racists or TERFS etc.