This argument doesn’t make any sense. The isps would just deprioritize the zero tier traffic so you couldn’t use it effectively. It’s only faster because of how things work today.
Nobody would care about being able to watch Netflix via zero tier if it’s faster to watch without it (which the isps would most certainly ensure).
I also think it’s nieve to assume that large tech companies want neutrality.
Sure, companies publicly say that they are for it but if they could pay to prevent new competitors (without the same capital resources) from challenging them it’s my hunch that they’d gladly do so.
They aren’t on our side.