Earlier quoted context omitted.
"So, everyone spends money, no limits on it" . Not true, there are limits (e.g. in the form of leverage ratio caps) and not everything borrowed is immediately injected back into the economy (that might bump inflation too much). Imagine if banks couldn't 'print their own money', then businesses would depend on people investing to get funding and demand far outstrips supply. So we'd have economic contractions on a mass…
How does a regular bank print money?
You can probably guess this puts banks in a very privileged position. Hence the high requirements for being able to start a bank of your own, and the government regulation intended to control inflation and fraud.