Thanks for the explanation. When you say:
When you receive sats through the Lightning Network, they are added to the balance of the payment channel that you have open with the sender.
My point is, that if I withdraw sats from my SN wallet and send it to my Zeus wallet, which is connected to my node, I am not opening a channel with the SN wallet.
That was my confusion.
Others have explained to me what in fact does happen in this case. See prior responses.