I don't feel this way any more. The sentiment assumes that there are good ideas which need to be expressed, and that bad ideas won't get as much traction, so the net effect of unfettered expression is beneficial to and even essential in a healthy democracy.
That's no longer the case in America, which is not a healthy democracy, and perhaps elsewhere as well. Today, the people with ideas worth hearing are largely ignored, and the people who actually do change minds are doing so with indoctrination and lies. Now, free speech is doing more harm than good. New mores are needed to deal with that.