We survived through a few ways. When emotions suddenly rebels and retaliate against happiness but we still have to perform professional tasks we divide the heart and brain into two telling them: Hey part A, do the damage control for a while will ya? Me and Part B gonna have to settle a few work. We'll deal with the collateral damage later okay?
Some people can.
Some people can't.
Who are we to judge?
The pain, the grief, the loss and the misery.
We absolutely know nothing of how awful can these things damage someone.
Because they work on different manner on different people.
Anyhow, just saying.