Depend on the story itself.
Usually, the thing that affect the most is the theme and genres, with the additional "audience target" factor included.
An MC in the story about slow slice of life cafe owner, would habe a laid back life and not quite harsh treatment, despite the struggle here and there.
Logically, he wouldn't have a very harsh life like a MC from a story about warrior attacking the demon army in the middle of human-demon war.
As a writer, you can write anything you want, as long you write for yourself.
Buy, when you want to share your writing to others, writers usually cares a lot about their expectations.