Well, it is causing greenhouse heating, that's the whole point, any freeing up carbon is inherently linked to that. But it is more appropriate to say that we have to reduce net emissions to zero; there would be no problem with emissions if there's a compensating carbon capture of equal amount. At least after we've "paid back the debt" by recapturing the excess emissions of earlier decades - there needs to be some period of negative net emissions before zero net emissions would be okay.

Why do you prefer "freeing up carbon from the ground" ? Usually that's just a sideeffect that happens only because we want some other thing e.g. extract energy from oil or manufacture cement by calcinating limestone; and if we want a stable atmosphere then we can't be freeing up carbon from the ground without putting it back.