A lot of people think of inflation as the consumer price index. ( Gas, bread, cars, toasters, etc) if those go up it puts pressure on wages because people cannot afford to live on existing wages at a certain level.
The price of collectibles like rare art or comic books could go up or down a lot but the general economy doesn't care about those assets.
The point isn’t about what you think the economy “cares about”. You mention commodity products which are a part of the picture, but they are all depreciating assets.
In the end, there is an increased amount of money in the system. That money is looking for returns. Investors flood into the asset classes where they think they can find returns. This means collectibles increase in prices, but other (more common) assets like education, housing, and stocks have also increase considerably.
The price of collectibles like rare art or comic books could go up or down a lot but the general economy doesn't care about those assets.