I'll never understand the people who stand in line for an hour for "Free donut day" or something similar. You really value a $1.50 donut equal to an hour of your time?
Most people do nothing with their time. You're not being paid to watch TV or play video games. Learning is perhaps the only thing that pays, and it's not cash nor immediate.
But that doesn't extend into all hours of your life. Your employer will not pay your hourly rate for your personal hours just to live.
You can of course then say "oh but I value my time," but value is subjective while the dollar amount isn't. If you truly believe that, then you also believe that people's personal time has different worth based on how much they're paid, which is a fundamentally wrong way to look at the world imo.
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.