I suspect you believe that as an article of faith, but it makes me think you haven't been on the internet in decades. Go onto thedonald dot win and you'll see hundreds of thousands of people who have created an insulated bubble where assertions that support their preferred outcomes are articles of gospel.

If you can go on there and convince a single person that the election was legitimate, that ballot security measures make it impossible for their beliefs to be true, and that Biden was legitimately elected, it's possible for the proposition "free and open discussion can diffuse false ideas" to be valid, but if you can't, then you might want to reevaluate.