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It's more biology than linguistics but it sounds like learned or acquired reflex.

a reflex which is learned through practice or repetition and may involve both a far more complicated set of triggering stimuli and a far more complicated pattern of motor response,

e.g., the reflexive motor actions produced after one has learned to ride a bicycle or drive a car; most such reflexes are somatic because they involve complex response patterns from skeletal muscles.

There is also a psychological term: Unconscious competence

The individual has had so much refining practice with a skill that he or she does not really need to think about what to do. It has become "second nature" and can be performed with very low frequency of errors.

Because the skill is not occupying much of the individual’s conscious thoughts, it can often be performed while executing another task. The individual has become so comfortable with the skill she/he will often be able to teach it to others.

Based on your edits, it is related with Curse of knowledge also:

The curse of knowledge is a cognitive bias according to which better-informed people find it extremely difficult to think about problems from the perspective of lesser-informed people.

There's a Wikipedia article on topic and comment in a sentence that strives to explain how various languages devise to stress the focal element in a sentence.

I quote the initial passage:

In linguistics, the topic, or theme, of a sentence is what is being talked about, and the comment (rheme or focus) is what is being said about the topic. That the information structure of a clause is divided in this way is generally agreed on, but the boundary between topic/theme depends on grammatical theory.

The topic-comment distinction was studied in great level of detail by the Prague Linguistic Circle, presumably in connection to various shades of meaning one can achieve in Czech by opting for different word orders in a sentence. (Czech, as a richly inflected language, offers a good deal of freedom to the speaker as regards word order.)