> then proceeds to mention how it's and added workaround

The nice thing about this "added workaround" is, it's undetectable. Consequently, the sender cannot know if you're doing it. They don't know if the node that looks like the destination is the real destination or a decoy. Monero does not have this feature because it is sender-traceable by design.

> every output is always a proxy output

Zero monero outputs are ever proxy outputs if by that you mean "they hide the real recipient from the sender." They cannot be because the sender creates them in monero. He necessarily knows exactly where the money goes because he picked the destination and did not create a decoy.

> if I know the coins I sent to you end up at "node x"

This is the fundamental difference: with lightning, you never know that. The destination might be a decoy and you as the sender have no way of detecting that.