I know I'm not going to convince you, because you can be very stubborn when it comes to the definition of things
Is it still stubbornness if I am right? ;P
It's not a unicorn, it's just a normal thing people have to manage.
Life is a thing they have to manage. The separation between different experiences of living doesn't exist.
Our work-life balance was terrible, everyone was miserable, but we got it done. At the time we were proud of what we accomplished... but we all know there was a huge cost to our lives.
Your life was terrible at that time and then you were glad you made it through and accomplished, even though there was a cost to get that feeling.
It is just life. It is singular.
Now I'd prefer to let a project fail if they set unrealistic timelines because I don't see any reason why they should be successful after failing to plan appropriately.
For sure. This is about taking control of your life and knowing your boundaries, capabilities etc. However, what incentive would you need to push through and get it done? More money, an extended vacation, if it was for something like a step toward curing cancer? What is your cost-reward structure?
Maybe when younger, you didn't value yourself as much as you do now.
Good leaders ensure their staff have a good work-life balance by protecting them from unreasonable requests, and bad leaders ask or demand their staff to work more than they are getting paid to.
At least as far as you and I are concerned, we aren't forced to work for a particular company. We always have options in life.