We can print more money, but it's not about "affording" it, the money printing at most changes the value of the dollar (i.e. inflation/deflation).

The rest of the world wants dollars, and as long as they do, the US benefits massively from that demand, and it would be foolish not to satisfy that demand, as it's pure benefit to the US.

It seems that many are devoted to ending the status of the dollar as the reserve currency of the world, but it's a strange and subversive thing for any US resident to want or desire.