Because she has an easy out if she's unhappy. If she can't get her mind right with the resources available to her, nothing will. Life is hard and there's a reason they say only the strong survive.
But maybe you're an actual saint and you really are the person to say I made a strange post. Maybe if you had a co-worker who left early in tears on a regular basis because of the demands of the job, while you had to pick up the slack for them, you would support them leaving all the time and tell your boss (or if you are the boss) they should be kept on the payroll for as long as it takes, indefinitely. Maybe when some a$$hole cuts you off, your first instinct is thinking they're having a bad day. When someone is rude to you when you're checking out at a store, instead of being annoyed or upset, you ask them if everything is alright in their life and offer them a hug.
If so, you're a much better person than me.