1 year later! No disagreement. It matters to the person who used coinbase to buy their bitcoin then used a mixer. It sounds like you know your stuff but I would be concerned for someone who tried to use one for privacy and then found themselves under suspicion. Bitmixer is closed down and it is for the reason I listed. LE is a blunt tool.

Atomic swaps via different networks might be a temporary solution, or Monero. Although I would guess Monero can be tracked they are just sleeping on disclosure to wait for a big enough reason to use.