For example, the artist: their livelihood is directly threatened by AI, if not now then probably in the near future, and they are responding by posting about their fear. It's transferred into enragement because that's what gets them engagement and support, but underlying that is fear. If they were to directly post about their fear there's a good chance they'd be mocked even worse so don't judge them too harshly for this.
Then along comes someone who has no skin in the game, except that they think AI is cool and something they want to be seen as an expert in. They feel it's necessary to point out to the person who is fearing for their way of life how WRONG they are. When all that person wants and needs is support.
In these types of situations, when you don't directly have skin in the game, and you don't have any support to offer, it's almost always better not to reply. Make your own post proving how right you are (without linking/tooting/screen-shotting or in any way referencing the other post), and let that other person get the social connections and support that they need. Otherwise, you are Reply Guy!