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This is the correct response IMO. Lightning has it's own limitations, but the alternative is flip-flopping between weaker forms of money.
The reddit user's workflow is 1) Sender converts BTC to ALT, 2) Send ALT to receiver, 3) Receiver converts ALT to BTC. While you could hold a big bag of ALT to reduce the number of on-chain swaps, that bag depreciates over time (relative to BTC) as it's a weaker money.