I understand that all too well!! I spent 14 yrs working in a factory. Was a Blue Collar Worker to the core.
Due to a Job displacement(Farm Economy collapse in the 80's), I found myself working in an office. Talk about Culture Shock!!
But after 28 yrs I am pretty well adjusted to a different kind of grind.
Before I was physically tired at the end of the day. Now I am mentally tired at the end of the day.
It takes a complete team to acomplish the daily tasks.
Work is work no matter how you cut it.
I actually believe, and studies might bear me out, that mental strain is worse than physical strain, I don't believe in either, not worth it, it's my life and they want to use it up