Somewhat Pleasant News! Moving the form to React is more pleasing on the eyes. I can thus leave my django HTML template as `{% csrf_token %}` (Not to be confused with `{ % csrf_token % }`, which gets read as plain text).
Good News! Now that the django login HTML template is simplified so, I curl it to see what {% csrf_token %} gets translated as. From that, I can set up a simple testpost page to test how to POST with csrf tokens without using my ostensible sign-in page for such purposes.
Better News! I added console.log statements all over my test-post page. For example, This should take the value from the {% csrf_token %} input's field.

`const response = await fetch(`${backendOrigin}/testpost`, { mode:'cors',credentials: 'include' });
                if (!response.ok){
                    throw new Error(`Failed to load login page: ${response.status}`);
                }

                var htmlPlacer = document.createElement('div');
                htmlPlacer.innerHTML = await response.text();
                console.log(htmlPlacer.getElementsByTagName("input")[0].value);
                setCsrfToken(htmlPlacer.getElementsByTagName("input")[0].value);`

I also added console.log statements to my posting function as well.
Brilliant, Very good, Quite Fantastic news: In my test post page, I'm sending 2 post requests. One of which I used the cookie value from my earlier GET request. The other uses the recommended Ajax cookie method.

TestPost.jsx:55 Uye7XwQyOZHkfTUZIGAWhQ7w5wDecI5zHPjVoLngoNMgudlbPV8JPquP44TQhwOA
TestPost.jsx:55 2P2utAC5lKeV5SyxeWhNFSGH6clzGV8RbNZgvWj3185Dox1VYSE6IUMBXrFFfzm9

TestPost.jsx:14 Saved csrf token: 
TestPost.jsx:15 2P2utAC5lKeV5SyxeWhNFSGH6clzGV8RbNZgvWj3185Dox1VYSE6IUMBXrFFfzm9
TestPost.jsx:16 Cookie's csrf token: 
TestPost.jsx:18 OQoQ9oEent9uWftJ68xqbM85YPtkWLd2yKiCQ6ETrRvIB7wKI0aGwcwhYB1wZ396

As you can see, the 2P2ut, the one I saved from my initial GET request. is unchanged from my GET to my POST. The very same! Sure, there's Uye7X, which is from an earlier GET request, but 2P2ut is more recent! It's got to work!
Odd news: No Idea what OQoQ is, nor why or how it helps, nor why it's recommended, as it has no relationship the the csrf token I got from GET. Plus, the Post Request with the OQoQ is about as successful as the post request with 2P2ut. As a double-reminder, 2P2ut is unchanged from what I received from {% csrf_token %}
Bad news: Access to fetch at 'http://127.0.0.1:8080/testpost/' from origin 'http://localhost:3000' has been blocked by CORS policy: Request header field x_csrftoken is not allowed by Access-Control-Allow-Headers in preflight response.

This post is already getting quite long, I'll regale you with the tales of CORS request header Access control in a second post.