I don't really understand how you define "argue" such that you can completely avoid it while still admitting differences of opinion...

To me, argument is functionally synonymous with the life-cycle of disagreement/resolution/coordination. Other qualities of intensity or emotional valence are almost entirely orthogonal to this core process of communication and negotiation to handle inevitable differences of opinion in a partnership.

Through that lens, never arguing seems like never sharing opinions nor making joint decisions.