My significant other does manual labor, and it's a good day when they don't want to just come home and fall asleep on the couch and those good days are rare. Even after my worst days of a software dev job, I still have the energy to come home and cook dinner, do some yard work, and other chores.

I will echo your line about wishing manual laborers were better appreciated. I have impostor syndrome, but it's not in comparison to peers in my industry, it's feeling like I don't deserve to earn multiples more then people like my spouse who break their bodies for a pittance.