I agree. "The people of the prince who is to come" is the Roman army when they destroyed Jerusalem in 70 AD.your point is correct as far as it goes: punctuation and chapter/verse divisions are human additions, but your conclusion doesn’t follow, because removing punctuation does not remove grammar, and removing verse numbers does not remove subject continuity, so the interpreter is not “relying on human intervention to define prophecy,” he is relying on Hebrew syntax, verbal sequencing, and subject introduction rules that existed long before any translator touched the text; the colon in v. 6 proves nothing, agreed, but the subject shift it marks is not supplied by translators — it is supplied by Daniel himself when he introduces “the people of the prince who is to come,” which is a new actor whether you punctuate it or not; punctuation is commentary, but syntax is revelation, and the subject‑chain follows the Hebrew subject, not the English colon.
But (as the text says) "TO COME" as in "WILL COME" - at a later date. Does not mean that part of the verse happens during the 70 week time frame but rather AFTER the 70 weeks are over.
But obviously verse 27 gets back to the 70 week timeline by finishing up with events that are to occur during that last week.