Lightning can hop through payment channels, you can pay anyone on the rest of the Network, infinitely, sometimes for free (if someone wants lots of BTC going through their channel)
The clue is in the word "Network", if you can only pay one person again and again, it's not really a Network. Lightning is a network, where you can pay anyone.
So you are saying that all payment channels are connected or is this a special case. Like if there is a channel between A and B and another channel between B and C , so does it mean there is automatically a channel between A and C?