You avoid exposing your node to bolt11 failure with blinded path or bolt12.
Always make sure they are nokyc like WoS.
When you receive money, Wos does not know who it comes from, and when you send money, you can use lnproxy so that Wos does not know where it is going either.
So the only thing WoS knows about you is your balance.
And a very sophisticated attacker would only know that you receive through WoS without exposing your Lightning node, and your activity remains hidden among all WoS users.
So these types of services are great for gaining privacy by hiding in the crowd.