I don't understand it either, as in why don't most people have any concept of time-off? I guess many Americans depend on 100% of their salary to pay their bills

I don't understand it either, as in why don't most people have any concept of time-off? I guess many Americans depend on 100% of their salary to pay their bills and so can't afford to take any unpaid leave. But why not take sabbaticals if even for coding something interesting to yourself?