npub1t4…qsdf4 on Nostr: I already have an open lighting channel running on my node with funds ready to spend. ...

I already have an open lighting channel running on my node with funds ready to spend. I just want to use LNbits to control those same funds. Why would I need to send that money away from my own self-custody lighting node wallet over to some kind of custodial lightning wallet, just to then turn around and send it back to LNbits?