Just because they are both packets over the network, they are different use cases and present a feature which can be charged for.
If you don’t like it, switch to a different provider. If there isn’t one that meets this need, maybe there’s a market opening. If the market is anti-competitive and exploiting that and colluding to shut down this feature, complain to the FCC. If the FCC dismisses your valid complaint for political reasons, vote out the party which put them there. If you don’t have the votes to get the people in power to care about this issue and regulate against the monopoly which is colluding to overcharge for it, then deploy a few thousand bots to sow dissent on Twitter and... no wait, don’t do that last one.
Charging people for different use case while the product is literally the same is one the most anti consumer things I can think about it, no idea why you think it's okay.
Imagine a eletricity bill that had different prices if your vacumm cleaner was being used on the living room rather than say, a bedroom, I see it as simply absurd.