These generalizations make no sense person-wise. Everyone has their own set of shoulds, don’ts and do-it-myselves. There’s no single law with all the bullet points.
That said, your usual selection contains [too] many people’s shoulds and don’ts, on both sides.
Root comment in this light basically boils down to I do everything myself and don’t need anyone to break this perfect system. Which is reasonable, imo. If there’s no synergy by design and a person is okay alone, that’s reasonable.