In my personal opinion, because that's dehumanizing to yourself. It's the same as thinking every waking hour of your life has a dollar value in terms of dehumanizing.
In reality, every hour of any life is invaluable since you'll never get that back, no matter how much you're willing to pay for it.
But capitalism forces you to think in terms of your employer and bypass that basic humanity, and think of opportunity costs. There is more to life than just work and being "useless" is part of that life again in my personal opinion.
Not every second of your life has to be productive or have a dollar value attached to it. Yes, you can assign that dollar value to any hour of your life by choosing to forgo that free hour and serve your employer (opportunity cost). But the actual value of that free hour is still $0.
In reality, every hour of any life is invaluable since you'll never get that back, no matter how much you're willing to pay for it.
But capitalism forces you to think in terms of your employer and bypass that basic humanity, and think of opportunity costs. There is more to life than just work and being "useless" is part of that life again in my personal opinion.
Not every second of your life has to be productive or have a dollar value attached to it. Yes, you can assign that dollar value to any hour of your life by choosing to forgo that free hour and serve your employer (opportunity cost). But the actual value of that free hour is still $0.