I point out that the sender knows the recipient's address in monero

Grinder thinks "what a ridiculous observation, of course he does"

What grinder doesn't realize is: (1) that's bad for receiver privacy, especially when the sender is your adversary or colludes with your adversary (2) it has led to multiple arrests in monero when the sender colluded with the police (3) it's completely preventable (4) it's fixed in lightning

Just because you're a nostrich you don't have to stick your head in the sand