I keep reading that LN is private for senders and that there is no way to know from which UTXO my sats are coming.
But...
The receiver of a LN transaction knows from which channel the invoice has been paid. What is stopping the receiver from colluding with every intermediate hop to get to the source? In most transactions I've done on LN there were just 3-4 few hops, five at most, and most LN channels are not anonymous identities. They can be contacted, just can get their contact details on Amboss.
This is the dumbest attack I could image in 3 minutes but there are many articles about other techniques as balance probing or timing attacks.
What are your thoughts? Is LN only private against a lazy attacker?