> I'm reshaping my speech to achieve a certain goal, rather than to convey facts.

When communicating, you don't simply recite every datum you know. You edit, you choose facts to communicate a specific set of points. Those points themselves are not random; they are in service of helping you achieve some goal (to get someone to laugh, or to get someone to do/not do something, or to change someone's opinion of you, to make someone feel comfortable, to get a person to bond with you, or whatever).

> am I serving the other person's actual interests

This is the key.

> would I be fine with them seeing exactly what I'm doing

See my first paragraph. Nobody thinks you are reciting facts at random when you talk to them. QED to the extent anyone thinks about it, they understand that you are trying to advance some agenda (drop the connotation on that word). Because this is how human communication works.