I see. Maybe another way of thinking about that is that trampoline routing is also an option, as it is on BTC-LN. E.g., Alice and Zed don't care about the specific hops between them: they only care that the money arrives, that the total forwarding fee is less than x, and (for some users) that no third party can easily learn the identity of both the spender and the receiver.
Discussion
Trampoline routing is not a comparable option as it has much worst privacy.
The remarkable thing here is that you can do fully self sovereign routing, with full privacy , over a lightning routing network without validating any channels other than your own.
The only requirement is having an anti-DoS mechanism for channel advertisements. There's lots of obvious ways to do that, such as generic proof-of-sacrifice.