No, it's not foolish. We need to keep markets liquid to avoid a lending crisis. That's why the fed announced asset purchases. They don't do them all at once. They buy steadily over a period of time to help keep prices stable. That's very important.
They had to do rate cuts now because it takes a long, long time for them to work (measured in years rather than months). That was a preventative measure, not a band-aid.
Look, guys, I promise you the fed knows wtf they're doing. These guys live and breath to be ready to respond to these type of emergencies.
We should be far more worried about (the lack of) policy responses from DC. DC has no idea wtf they're doing, and it shows.