Since deflation is an obvious tax on investment and purchasing, arguments that increases in the value of a currency are "obviously" a good thing serve as a sort of litmus test for why people are interested in things like Bitcoin.
The subtextual motivation for Bitcoin advocacy has always been "it's a speculative asset and I hold a position in it". Everything else is just rhetorical cover.
The unfortunate reality is that even by reasoning through Bitcoin's programmed-in deflation, we're dignifying Bitcoin. Bitcoin itself is a sham. The original paper may have been a good-faith contribution to the state of the art in cryptocurrencies, but the "economy" is a trap; a realistic-looking distributed transaction clearing system built on a deliberately volatile wholly synthetic "asset" that exists for the purpose of creating pump-and-dump scams.