Earlier quoted context omitted.
> The ideal is that better ideas, not power, are the best response to ideas someone doesn't like. Better ideas do not win -- ideas that are proclaimed the most or the loudest win. This is the problem we currently have.
That's a fair point. A very undemocratic one, but it is a cogent reason to not value free speech. Though if that were true, we'd be looking for ways to limit keep especially dumb or naive people from participating in elections. I don't get the sense that anyone, including YouTube and Reddit, is seriously proposing that.
I value free speech -- everyone is free to share their opinions. But speech isn't distributed evenly. It used to be that only the very wealthy or the very organized could widely distribute their speech. Now it's very wealthy and anyone with far too much time on their hands. This is not a better situation.
People can now wield speech as a weapon -- not by spreading better ideas -- but by simply using so much that it drowns everyone else out. Your own speech online is literally worth less because you're not willing to spend hours every day posting it.