Historically, every time someone created a new way to do something which required fewer people to do it, the demand simply expanded. We don’t use steam locomotives anymore, which eliminated thousands of “full-time jobs” spent building and maintaining them, but we ship more freight by railroad than ever before. (And, “we ship more freight by railroad than ever before” be-cause we don’t have to use steam.)
“Sitting around on your own ass with nothing to do” might sound idyllic – until you try it. Pretty soon, you’re looking for something to do … and, you find it.
I’m a firm believer that, several times during your life, you should change “what you do for a living.” Re-invent yourself, if only to re-remind yourself that you actually can.