It's not all that crazy. The general problem is that a lot of people aren't familiar with a liquidity trap, they're just familiar with the problem of too much inflation.
Part of this is because inflation was a really big problem in the 70s and early 80s. The way monetary policy usually works is pretty easy. Growth usually corresponds to inflation. If there's too much inflation, raise interest rates. Growth starts to slow too much, cut interest rates. It's all about smoothing out the up/down (or boom/bust) cycle. In the 70s though, we started having this problem where we were getting high inflation without significant growth, so the standard remedy wouldn't work.
Now (or a few years ago) we were facing a different problem, which is failing growth that wouldn't respond to interest rate cuts, because you can't cut them below zero. Deflation definitely is bad in a modern economy, because it leads to drops in production, and because it also sets up a self-sustaining cycle that you have to break out of (less spending means economy shrinks means deflation means your money is more valuable tomorrow than today means less spending today, etc).
Problem is, the way to break out of that trap is... you have to actively take inflationary measures that would be crazy in any other environment. It's what we had to do in the Great Depression, which was a similar circumstance in terms of the macroeconomic mechanics. Now, maybe they did too much, maybe they didn't do enough in a quickly enough manner - but if you want to see a good example from recent history, look at Japan. They were a powerhouse in the 80s, only to hit this exact sort of thing, and their economy stagnated. It's really only started to kick back into gear after the current government expressly said they're going to try to drive inflation up to get things moving.
Put yet another way... I wouldn't normally want someone to zap my chest with a couple hundred volts of electricity, but if I'm in cardiac arrest, um, yeah, it might be called for.