It certainly can be a positive thing to remove people's megaphones who are not acting in good faith, who are spreading violence and vitriol. There's almost no room for "understanding and exchange of ideas" on twitter, and definitely not what Alex Jones et. al. is seeking from the platform.
I also think that one of the biggest issues facing "understanding and exchange of ideas" in general is the idea that no one can be earnest or genuine in their outrage. Your original post used the term "virtue signaling," but even saying that the person is "throwing a tantrum" is purposefully trying to diminish the idea that the OP might be rationally upset about the events that have unfolded.
https://www.iep.utm.edu/abortion/
US public perception might have swung to favor a different weighting, but not following this is clearly far from "not wanting to talk about it".
I still think it is a great example for this HN thread though, as having different opinions is suddenly perceived as a hostile act with - presumably - mean intentions.
Disallowing discussion is never “making the world better” it’s quieting it for a bit while breeding contempt and violence. It’s why Trump is in office. You take away peoples voices, if anything you strengthen their beliefs.
When you push them to places where only like minded individuals hang out, the filter bubble becomes unbreakable.
Quieting voices you do not like is never a positive. Period. It’s a child’s solution. Understanding and exchange of ideas without condescension.