Nevertheless, here are some examples:
Ex: You do as I say.
Ex: Please pass me the salt.
Ex: Go in and take a look.
Ex: I now put the chicken into the oven.

You then wrote: Can you explain the differences between these examples?

My reply: Why shall I explain the difference? I am pointing out the sameness in them, their characteristic. These Simple Present examples are not habitual actions, aren't they? Every day we would make countless Simple Present statements like these. They prove Simple Present doesn't relate habitual actions.
Hello Shun

The first three sentences are examples of imperatives. The last example is a special usage we have already covered, somewhere in the preceding 14 pages: commentary on actions of the moment, e.g. during football matches, cookery programmes, and demonstrations of one kind and another.

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Since I last posted on this thread, I've read some of your posts in other forums, on similar themes. I appreciate that this is a subject which you've considered for many years; I sense that you also find it frustrating that native posters generally disagree with your findings.

Now I can't speak for other posters; but for myself, I find it quite difficult to access the thought behind your posts. Are you able to explain it in very small steps, to make it easier to understand? Or to point me to a thread where you have already done so?

MrP