> To me, it’s just another of saying “the more life experience I gain…”.

I believe that if you never were in a position where your job was a soul-crushig source of misery and despair, you've been lucky to live a sheltered life.

Most people don't have the privilege of picking and choosing outstanding jobs with decent work/life balance, nice colleagues, reasonable deadlines and considerate stakeholders. Most people have rent/mortgage to pay, kids to feed, and unfavourable odds of improving their life with low risk and impact on your life. I'm sure they gained a lot of life experience too.