Tweets are low effort and short, you can even do it while taking a dump, there is a lot more friction to being unhinged when you are writing a book or taking an interview, for reference trumps most unhinged stuff is tweets, not interviews and not books. Not all forms of writing are equal.
Trump's tweets are low effort. Just like most of his rally speeches, which are also unhinged. Other presidents, especially e.g. FDR, put effort into all of their communications. Including speeches and, when available, tweets.
