Earlier quoted context omitted.
But (correct me if I'm wrong) payment channels are connected to particular sets of recipients, but not necessarily any and all recipients. Your money is locked into that channel until you close it. You might need to open a different channel to reach your actual recipient.
No, you are missing the "network" part of "Lightning Network" it uses an onion-routing-like protocol to allow you to pay "through" other people. So if I have a channel with you, and you have one with coinbase, I can buy bitcoin from coinbase through you without ever opening another channel, entirely counterparty-risk-free. And in that scenario if you "refuse" to relay my transaction, or you try to do something sneeky…
Bitcoin's only advantage at this point is its price, which will go away as soon as there is a crash. Then we can scrap Bitcoin, LN, and all the baggage and start with a clean 3rd generation crypto slate.