Governments bestow, enforce, and adjudicate legal rights.

There may well be other types of rights that are being discussed here, and much of the confusion in discussions of rights seems to revolve around disagreement on those definitions. It becomes something of a mott-and-bailey tactic, or one of terms expressed and understood quite differently by participants.

I would instead say they have no right to revolt rather than no business revolting — their business is to give themselves rights.

Because the government would never bestow them with the right to overthrow it?

That's literally what elections are.