Your national bank will also create money out of nothing. It’s as simple as typing numbers into a computer. They don’t even need to bother printing it out. However if they suddenly added trillions of dollars then it would cause huge inflation issues in the economy, so they do it sparingly and responsibly. The difference with crypto is that the creators use the difficulty in solving the algorithm as a way to curb the production of their currency. If anybody was allowed to just add money to the currency then there would be runaway inflation. By making it deliberately very difficult to create it allows a slow and steady supply that doesn’t tank their economy.