If you don't want to receive federated sats, you just present a regular LN invoice. The LSPs from the federation will accept the Fedi tokens & pay you in sats via lightning.
If you're paying someone in a federation, they present a federated lightning invoice. The LSPs send that user Fedi tokens when you pay the lightning invoice.
If you're a sovereign LN user, you're not impacted at all.
You are convoluting terms... no such thing as *federated satoshis* it is a receipt for a set amount of satoshis from a federation. Of course the problem with federations, side chains, drive chains, space chains, ect. Is always the pegging out back to actual satoshis. You are trusting entities to perform a function on your behalf in a timely manner. The only way that works is inside the same entity... I have zero trust for anyone who is not me. To my eyes the cost of introducing new counterparties and the complexity of fedimints is not worth the miniscule cost savings.
