@Norwegian-Mugabe I'll take it's lowish grade, gnawing at the back of your head stress we're talking here. The infamous "chronic stress". Life-work-relationship situations that get out of our hands and at some point may coalesce into that pit in your stomach sensation you take everywhere you go.
That's the extreme version, not saying that most people won't ever go through it at some point in their lives. I experienced it a few years back and it's hell on earth.
Ppl confront stress by a mixture of self-soothing behaviours (food, entertainment, drugs, sleep, It can get wildly unhealthy) and controlling ones, that's the overscheduling part, which I guess (never tried It) can only be semi-effective.
For many I believe it procures a sense of meaning and struggle. If you've got no leading principles in your life, nothing (aesthetic-philosophical-spiritual-vital) you're striving towards, then for sure you're gonna crave those stress feels.