Earlier quoted context omitted.
When using one’s own lightning node it doesn’t matter if individual nodes on the path to your destination node keep logs, they can’t collect much information besides who the last and next node are in the route. The original and final destination (as well as any other useful payment information) are obscured through onion routing and the information you can learn from traffic analysis is limited and difficult to perfo…
If you use your own lightning node, the other nodes on the path to your destination can still tell which node the information came from, and that can be used to de-anonymize your transaction. If you are the only user of your lightning node, it is trivial for the next person in the chain to attribute transactions to you.
Reference: https://github.com/lightning/bolts/blob/master/04-onion-rout...