"It always gets better"

As part of my renewed positivity, I have recently adopted this phrase. Yet, I am wondering the situations in which it does not cover. When it won't get better. To say this phrase is to exert a privilege that might not apply to all, making it universally meaningless. And when we say it to a friend in America, perhaps with many opportunities and securities, things will get better. But what about those who are poor? Addicted? Continuously unemployed? Continuously poor? Continuously oppressed? Genetically disadvantaged? How much hope is there for everyone not just the privileged?