That's the free market for you lol
Agreed, and it brings us neatly back to the original question of how to value your time....
So to throw another point into the mix: When is work actually work?
If you are retired and don't need to earn a living from what you do, you can therefore charge less and earn a few pounds from keeping your eye in (as Doganjo posts above), so is that 'working'?
If you absolutely love what you do and get paid for doing it, is that really 'working'?
If you enjoy the task you are doing, it then becomes even harder to value your time, if you would do it for free anyway as you just like doing it!
My job used to involve attending lots of black tie evening events, formal dinners, evening seminars etc, which I hated having to attend. For me that was definitely 'working'. Others at the same table/event, who loved their jobs, seemed to think it was a real treat to be fed and watered in beautiful surroundings at the companies expense while spending their evening talking shop with others who work in the same industry.
I would much rather have been at home with my wife and dogs.
A friend of mine who has always loved photography as a hobby decided to change career and take up photography as a career instead. From as far back as I can remember, she used to take a camera with her everywhere she went. Having packed in her job, retrained as a professional photographer, she then found that she hated the pressure of taking photographs as she had to perform to a professional standard, rather than doing what she loved, which was taking pictures as/when she wanted to.
We are strange beasts....