अनीश्वराः पितृमन्तः स्थितपितृमातृकाः पुत्राः ॥ कZ_०३.५.०१ ॥
anīśvarāḥ pitṛmantaḥ sthitapitṛmātṛkāḥ putrāḥ
Sons are not independent legal masters while the father exists and while both father and mother are living/present.
It prevents premature fragmentation of property and reduces intra-household disputes that spill into courts.