There is nothing wrong with emotional response targeting. Rather, as the author pointed out, targeting anger or outrage. He might have missed that other platforms, even Instagram, have outrage responses (atleast this is what the text seems to imply) but as he rightfully points out, they are significantly muted compared to Twitter.

Hackernews too has a culture of outrage, at times. Some articles stay on the frontpage for an entire day with very active comment sections. Most of the time outrage (though sometime the joy of a productive discussion).

Mastodon also seems to have less of a problem with retweeting (called boosting in masto), users seem to prefer their own content and boost only a few toots (though also from experience, less active users tend to boost more, me included a few times a week).