Bad example, because drinking vs flushing water can have real differences in properties affecting their price, availability and quality. Just like QoS can be me

Bad example, because drinking vs flushing water can have real differences in properties affecting their price, availability and quality. Just like QoS can be meaningful to differentiate low-latency vs high bandwidth. The problem starts when service level is is based on the service-provider, not the type content, when Spotify music is cheaper than Apple music, even though both are just music. A more accurate analogy would be if the cost was based on the brand of the faucet, or if electricity was charged differently for using your stove vs running your AC. Or if roads had a fast-lane to drive to Costco, while the rest share a jammed single lane.