The much better argument is that BigCos are seeking to establish a cartel for the primary purpose of excluding entrepreneurship and limiting consumer choice. Emphasize the importance of the internet as a free platform for the market and that net non-neutrality allows an undue influence over that market to whoever the local telecom provider is.
This is very real, because the main driver of interest for net non-neutrality from the ISP side is the possibility of protecting cable subscriptions. On that front, it's tech giants v. telecom and entertainment giants.
Over 30% of Disney's gross revenue comes from ESPN (yes, really!), and most of that revenue comes from cable subscriptions. Anecdotally, typical-speed internet access will only consume around 30% of the average consumer's cable bill, meaning a cancellation results in ~70% monthly revenue loss from that customer (bundles, contracts, and packages are used to attempt to control this).
Cordcutting is a very real threat to the established players, directly conflicting with their interest in delivering stable internet services that are sufficiently reliable and speedy to stream videos.