LN receiver privacy isn't so great and amount privacy isn't guaranteed from larger nodes.

What is worse, is because of it's increased complexity, a disproportionate number of LN users are using custodians or LSPs from which they have no privacy (just look at Nostr zaps or custodial ln wallet downloads vs non-custodial). That's where ecash can help a lot.

But ecash isnt perfect either. There are still things you have to be mindful about. Larger denominations of tokens gives you reduced or possibly even no anon set (because less users are likely to have those higher denominations for you to blend in with), making lightning payments out of the mint still comes with all the caveats of lightning of course (bad receiver privacy/amounts sent out being known by the mint), and mints can associate tokens with IP addresses so having network level privacy from the mints is a must (Tor/VPN)