Perhaps I was not clear. The goal is to get the coins from point A to Point B without a trace. Do I have to spell it out any more clearly?? Lol.
They mean is the only way to transfer BTC without a transaction record on the Mempool is by sending the seed backup to your friend which is not advisable.
Anyway, the only solution to this is by using a mixer to cut the traces. Sample one of the mixer under my signature.