Clearly suppressing a truth is bad. But modern technology causes massive amplification of falsehoods in a way that just didn't exist in the past, and that's bad, too.
From a utilitarian perspective, fake news and persuasive technologies do real harm, and not just to the people who are persuaded. Unless something is done at the group level (i.e. by the state) the harm will continue. You might consider that an appropriate trade-off for liberty, but others can reasonably disagree without being weak.
The problem is that we are learning this is not true. Falsehoods can come so fast that the truth never becomes known. https://news.mit.edu/2018/study-twitter-false-news-travels-f...
A lot has changed since 1789, and there is no reason not to re-examine the assumptions that were made then in light of technological developments over the past two centuries plus.