You're conflating "equal" and "equitable". The latter of the two is along the lines of "fair" - a fully nebulous term in this context; its entire raison d'être is to push agenda narratives.

The idea of equitable outcomes is a common law concept used for things like contract breach remedies, which is again something that the great-grand-parent touched up on.

That is, it's an idea used for compensation when one party walks away from a mutual agreement - the logical implication is that mutual agreements are equitable, which is why compensation is needed to re-establish that state upon a breach.