It certainly is. I can't possibly fathom what goes on people's minds that leads them to think Twitter is a great platform for information sharing.
It makes me sad that humanity gave up blogging for tweeting. I can't think of a more unsuitable platform for making this kind of posts: it limits the number of characters, the UI is awful for continuity of posts, the webpage is really heavy since it loads much more content than the post itself and the platform treats unregistered users as if they didn't deserve to read the content.
People use Twitter to write long blog posts because of one simple fact: the presence of people to read your writing is more valuable than any possibible combination of typesetting, CSS, and noninvasive ad placement.
I dunno. As weird as this format is, I'd prefer this to the typical article these days with autoplay video, janky slideshows, ads moving the content around, a pop-up begging you to subscribe to a newsletter, Outbrain/Taboola ads showing cracked toenails and butt implants, etc etc.
The best platform is the one where you have an audience.
Twitter has the benefit of less friction - if it's on your feed you can read and get hooked on the story with no clicks. The reader funnel has one less step.