What if it is just a comment that the poster didn't agree with or the tone of the comment was misinterpreted, or they wanted to clean their feed from the dreaded "noise" I sure as heck wouldn't want to get into an email discussion over it.
Even as a free speech maximalist, I have to ask the question, "so what?"
Let's start with the assumption that anyone that creates a conversation can moderate that conversation. They have complete control over who speaks there and if someone that speaks there can be heard.
So if you run into someone who wants to exercise ironfisted control over what kind of responses they get – let them. Your offense is utterly meaningless in that context. So is mine, in complete fairness.
Nothing keeps you from creating your own conversation and linking to the original, making whatever comments that you want to say about it and moving on. In just the same way as the original poster had the ability and power to boot you from their conversation, you have exactly the same ability and power to keep them out of yours.
You have the complete power to speak. You don't have the power to compel others to listen to you nor do you have the power to compel others to include you in their conversation.
It's not a thing you get to have a discussion about. It's just a thing that every single person on the platform has the power to do.
How much does one need. Its getting to the stage that only a select few are able to use a voice and if you are not a Guru bam! To the gallows you go.
How much does one need? As much as one wants.
No one compels you to use these tools. No one compels me to use these tools. Nor can you compel someone not to use them.
There are conversations I would be interested in initiating and managing in which it's true, literally if you were not a guru you would be hauled off to the gallows – or at least not invited to partake in the conversation. That's exactly what the architecture of panels enables. Being able to manage and moderate the content of your own conversations is what allows people to make the decision of who and what they want to engage with.
You don't have the right to force yourself on other people. If you did, everyone else would have the same right to force themselves on you – and I'm pretty sure that's not something you want.
I'm all for the right to speak. I'm not particularly fond of asserting the right to scream and people's ears whether they like it or not.