This isn't incompetence, it is malice. Section 230 gives regular people a voice on the internet. Take it away and only the ultra wealthy and powerful still have a say.
Without section 230 the US will have a mass shutdown of forums like the UK just had a couple of months ago. Small forums will not be able to continue and large forums will become so ban happy current reddit will look like a free speech utopia by comparison.
What good is free speech that doesn't include the internet in the modern era?