Net Neutrality isn't needed
In a free market, with actual competition. Market forces ensure that customers who find themselves in a walled garden will go elsewhere.
The problem is that across large tracts of the USA, the market isn't free and telcos/cablecos have legally protected monopolies ensuring they're (literallly) the only game in town.
The "land of the free" is far from it (it's about #38 in the freedom indexes and still falling)