Is there a good reason not have a law that prohibits service providers from mandating the means by which you form requests your machine sends to them. I totall

Is there a good reason not have a law that prohibits service providers from mandating the means by which you form requests your machine sends to them. I totally get limiting the volume and frequency of requests. That's fair. Bandwidth costs providerds money afterall. But why really should you have any say over how I formulate my requests? Whether they comee from your app, a personal script I wrote or I hand form them in Fiddler, what's the problem besides the service provider's control-mongering. Am I missing something here?