Expanding Gwern's well made point, just a little, is that writing of any length needs a thesis statement in the first paragraph or so.

Thesis statements are not a new techniques, and these days they are needed much more because there is so much to read. Many articles don't state their thesis at all or not for a long time.

I don't have time to read that far to find out if it's worthwhile to me. Unless you are Satoshi Nakamoto, I'm not going to read far to find out.