I've presented many facts to support this. Economists know it, too. Study it and you'll see for yourself.
Another part of the flim-flam is the government is always trying to promote the idea that inflation is good for the economy. Read their explanations. It's all nonsense.
The Greek debt crisis was a great example of this, since they couldn't directly control the printing of the Euro, they were forced instead to siphon money directly out of citizen bank accounts to service the national debt.
You could imagine the same thing happening with a nation on a gold standard. In fact the US did something similar in requiring all citizens to deposit their gold holdings. Inflation of a fiat currency is just one of the many ways in which governments can 'tax' citizens to pay for government spending.
The reason nobody believes this is because of extremely effective propaganda emanating from every government that prints fiat money. The "Putin Price Hike" is the latest in a long string of lies about what causes inflation. (Inflation was at something like 7% before Putin's War started.) Of course, "the speculators, gougers, and profiteers" are always blamed, too.