the privacy use case of lightning just has not been fleshed out well by anyone yet, it's there...

i was designing a tor-like relay network last year that used a form of onion TLVs with source routing and micro accounts paid for by keysend/AMP payments, which required a different arrangement to public LN node networks - primarily do small payments and are mostly automated and they more openly advertise their channels between each other because you don't pay them by asking for invoices, you just zap them with a special code that unlocks a two key message to pay for a session and then you can use the node in a hop for general network traffic relaying