There's no ontological significance to common sense agreement. On the contrary, for something to be common sense generally means nobody has bothered constructing a corresponding argument or in some cases even a corresponding collection of propositions.
When people agree without even knowing what they're agreeing about this reveals lack of understanding, not a surplus of it; it is a measure of reflex, or of strategic considerations at best. Agreement is the surest mask of ignorance. The more complete and natural, the more total.