That is a preference for supporting user smartphone access (implying more preference for bandwidth supplied to customers when out and about), compared to customer use of their devices for tethering, presumably implying stationary usage settings.
To the extent that all networks are built with contention in mind, there always is a need for network management when congestion occurs. No network is built on the assumption that all conceivable customer demand, at the peak hour of the peak day, always will be supported without congestion.
That necessarily means some amount of network management is necessary. But it is hard to clearly distinguish between management to preserve user experience, under conditions of congestion, and "treating every packet equally."