IRL, whenever anyone tells me that the Fed's "money printing" is "causing" this or that other thing, I always ask: "OK, tell me how the 'printed money' ends up in people's hands, and why and how it causes bubbles and inflation like you say." Typically, the response I get is a deer-in-the-headlights blank stare.
In fact, the Fed cannot "print money." Only the US Treasury can, and it must first borrow the money or collect it in taxes. The Fed only buys/sells government/agency bonds in the open market, lends money to banks when those banks ask for it, and changes short-term rates.
To paraphrase H. L. Mencken, all these "money printing" narratives that blame the Fed for some economic malaise are simple, appealing, and wrong.
It's a reserve system. Money is generated by banks lending more than they currently hold. The Fed lends money to the banks which is then multiplied 10-20x by the bank effectively "Printing money." This is the same way that banks were historically able to turn 1lb of gold into 10lbs of gold notes. The Fed is responsible for setting reserve requirements and the FDIC insures bank accounts.
Right now the Fed has set reserve requirements to 0% effectively allowing banks to print unlimited money so long as they can cover their withdrawals and interest payments for Fed loans. The money isn't ACTUALLY printed, it is lent out as a number in a ledger.
You are right, there is a lot more to it. It's an internet comment, not an econ textbook. However, the short answer is, the way the Fed "Prints Money" is through reserve rates, interest rates, and loans to banks. They don't need a press to do that, just a ledger.
In fact, the Fed cannot "print money." Only the US Treasury can, and it must first borrow the money or collect it in taxes. The Fed only buys/sells government/agency bonds in the open market, lends money to banks when those banks ask for it, and changes short-term rates.
To paraphrase H. L. Mencken, all these "money printing" narratives that blame the Fed for some economic malaise are simple, appealing, and wrong.