Many of the countries where the USD is used as an unofficial second currency only due so because it's a better store of value than their own official currency. The USD can be used in six months to buy about the same quantity of goods or services as it will buy now, whereas a local currency may have lost half of its value by that point. If we start playing silly games with the printing press those other countries will have no reason to prefer dollars over their own currency and will start trying to get rid of them.
Frankly, I think we should aim for an even lower amount of inflation. No more than one-half percent per year, and ideally comfortably below that. Government also needs to be forced to have a balanced budget. No more spending money that they don't have. Cut spending, raise taxes, or meet in the middle. I don't particularly care, but we keep letting a bad problem grow worse.