Depends how long that takes to become possible. Just because it can be broken at some point down the line doesn't mean it will immediately be a trivial thing to do.

If they can break Moneros encryption in the distant future those users will be long gone and current users will already be on better tech so who cares 🤷‍♂️

You're telling me it will be possible to break encryption, but it's just too darn difficult for large LN nodes and spooks to actively save that data to break later? Please. 99.9% of custodial and LSP LN users would be in the same boat.