I'm confused by the juxtaposition of this statement and your preceding thoughts- it seems like quite a jump to say what seems to boil down to "Existing with mental illness at work and feeling like you have to hide it sucks" and then expand that to "People with mental illness aren't fit for the real world".
Who decides who gets to be classified as "apt for the real world"? There are a ton of depressed people out there, and for that matter, a ton of people who feel like they got screwed at birth for having the wrong color skin, the wrong sexual proclivities, the wrong family, etc. I think if you were to add up the people who feel like they've had to fight through a disadvantage, you'd find that they're the majority, not the minority of people in the real world.