Generally you have to have more assets than debt to be considered "wealthy." This is why the word "net" is important in the parent comment. And you are completely ignoring the second-order effects, which is that an economy with low, stable inflation is good for everyone. And if you are going to quibble "why is low, stable inflation good for everyone," then look at the deflationary spirals of the great depression (or any pre-1900 crash) and any hyperinflationary economy of your choosing.
> If demand decreases then production should decrease
Okay Chairman, have it your way. COVID hits, demand plummets, we do nothing to try to keep people in jobs or keep the financial system from collapsing. Less production is indicated!
> buggy whips
This is a total red herring and you know it. No one is talking about counter-cyclical monetary policy and implying it is being used to keep anachronistic firms in business.