It seems like the crux of your argument is that it costs something like $60/month to provide internet service and $20/month on top of that to provide TV service but they charge $50/month for each, so they wouldn't be profitable without the TV service. But who is setting these prices?
Is there some law that requires them to charge a money losing price for internet service and then make it up on TV service? Why don't they just charge a profit-making price for internet service?