There are certainly other points, but I think a big reason is practice/training. The process of translating thought into a language (written or spoken - also p

There are certainly other points, but I think a big reason is practice/training. The process of translating thought into a language (written or spoken - also picking a language, being multilingual), and then into concise language, at least for myself, is a multi step process. A younger version of myself would be “too lazy” to keep that process hidden in my brain and would verbalize the whole algorithm with all its complexities and dimensions until getting to the point. It took trial and error and practice for me to realize people just wanted the point and fill in the details afterwards if necessary. Or that the other person wanted to find the reasons themselves as a way of confirming our thoughts are synchronized. It takes quite a bit of computational brain power to do all that well, whereas it’s easier to ramble and and brain dump.