I think you misunderstand a little bit. This comment isn't to disincentivize saving. There's nothing wrong with saving, in fact bitcoin is great to save due its long term appreciation vs a keynesian method disincentivizing saving via inflation.
This is specifically a comment towards hoarding. We (as Bitcoiners) won't hodl a parallel economy into existence. There has to be some signal to merchants that people actually want to use bitcoin as a medium of exchange instead of fiat.
End of the day people will do what they want but for myself Bitcoin has the most value as a money that cant be fucked with. If people dont use it as money and only treat it as a speculative asset then IMO we will never reach a "hyper bitcoinized economy" that I hear a lot of maxi types sqwaking about.