The issue is that “commercial” includes plenty of not-necessarily-capitalist entities as well, like sole proprietors and cooperatives (sole proprietors being single-member worker cooperatives).
Of course, a society in which worker cooperatives and individual craftspersons are the dominant forms of economic participation is probably (hopefully!) also a society which has done away with intellectual property and the enforcement thereof, rendering software license terms (including non-commercial use clauses) entirely moot.