From what I understand, a lot of corporations have power over the options consumers have, the market isnt as free as this argument implies. For example, coal and fossil fuel lobbies do a lot to prevent sustainable alternatives from being adopted.
The US doesnt rely on oil and coal because thats what consumers want, or because its necessarily the cheapest, its because the people that run those corporations have the means to subvert democracy. They are not cartoon villains, but they are absolutely villains.
What you are saying is true for plastic straws and airlines, but I would guess it doesnt really apply to many of these 100 corporations
defederation is not censorship