Half my life was spent fearing the result of limitless population growth and contemplating the inevitability of war and famine to shock population levels back down to sustainable levels. They warned us about this starting at least as far back as the sixties.
I see organic population collapse as a categorically good thing.
Long-term, possibly. But if the collapse happens too quickly it may cause a lot of issues. A slow steady decline would be best but may be difficult to achieve.