Nope; they aren't. They arrested a grandmother for praying silently outside an abortion clinic. They arrested a high schooler for saying a cop looked a bit like a lesbian. There are no shortage of stupid examples of their tyranny; even Keir Starmer was squirming a bit when Vance called him out on it.
Regarding the abortion clinic case, those aren't content restrictions. Even time/place/manner restrictions that apply to speech are routinely upheld in the U.S.