4) Satoshi is great. He solved one important technical problem. But, trust me, he doesn't know how money works. Why should we encourage hoarding? Why should we punish those who is spending? We, as bitcoiners, would someday come to a conclusion that let the total number of bitcoins increases 3% every year and make the mining a sustainable career.
Because BTC is opposite to FIAT money and that's exactly what FIAT is NOT doing - it's punishing hoarding and rewarding spending. Satoshi wanted something different.
This is a terrible argument, sorry. A kneejerk "we should do the opposite" because "fiat is bad, mmkay" is not compelling. Even if you took as axiom that fiat is bad, you're still on the hook for demonstrating why punishing hoarding and rewarding spending is a bad thing.
Economists - yes, including the Austrian ones like Hayek and von Mises - agree that you need to penalize hoarding and encourage spending to boost the velocity of money and create a healthy economy. This is the primary reason why deflation is viewed more negatively than inflation.
It is clear that Satoshi wasn't an economist.