BTC only means the actual printed/mined amount remains stable,
true.
but will not eliminate inflation/deflation in the short term.
Also true - but it may serve to _reduce_ inflation and deflation as compared to _real_ central banking.
If anything, it will make the short term inflation/deflation a bigger problem.
Only true if you believe that central banking has been successful in achieving its stated goals, as per its theoretical capability.
I see no evidence whatsoever to support such a belief.