system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why cant cable internet companies be tried under the Sherman Antitrust Act?

The competition between cable companies is nearly non-existant and its blatantly obvious.
gpt
The Sherman Antitrust Act doesn't make monopolies illegal. It makes actions in restraint of trade illegal. If a cable company were to try to turn a monopoly in one market into a monopoly in other markets, that'd be one thing. But it's not illegal to not have anyone else want to spend the money to build their own system.