> Inflation is a vector NOT a real number, any asset that people care about has become generally unaffordable i.e: housing, education, healthcare.

You came so close to realising it, but this is the real reason why Bitcoin can't deliver price stability long term - prices move relative to one another in the real economy. You can't preserve purchasing power by simply limiting money issuance, because exogenous economic shocks are real.

(also, Bitcoin can't prevent the Tether people from printing Tether and buying bitcoin with it ...)