[projectsforlife]

There's a contradiction in your reasoning.

Currently the money required to safeguard the bitcoin network is equal to the cost to electrify a small country like Argentina.

You say users can be shielded from the future transaction fees b/c of Lightning. Ok, well where does the money to safeguard come from if mining blocks produces less and less of it -- and users don't pay fees b/c of Lightning?

[ntoskrnl]

LN enables economy of scale. Imagine a future where the majority of txs use lightning (L2), and on-chain (L1) txs are much more rare. One L1 tx may cost 1mBTC. Or if you use L2, a node might charge you and 999 other people 0.001mBTC to route your payments (simplifying here). The amount of money hasn't changed, but it's spread out among more people.