You speak as if you have never in your life had work that meant anything to you. That's sad.
So let's say you retire. What are you going to do with your time? Watch TV and have hookers blow you round the clock? While I imagine this would be a great time for a week or so, after a while, I'd be looking to exercise my brain.
Have you ever given up work for a few years, temporarily retired?
I did for 3 years, but forced back to work to fund children, the reality for me was very different to how I thought it would be.
If you have half an imagination you will soon realise that works sucks, this 'i don't know what I would do if I couldn't work' mentality is just drone behaviour, pushed on you by society and MSM, for obvious reasons.
Hobbies & projects, eating, family, adventure, fun, exploration all become something to focus around when you don't need to work.
The planet is truly fantastic, and most of us never see hardly any of it.
Of course some people seem to need work to get out of bed in the morning and prevent them descending in to a couch potato life, but it doesn't have to be so.