I was raised to believe certain truths, such as hard work and sacrifice pays off. It's guided much of my life, from pursuing education, building a career, settling down and starting a family. I couldn't imagine what my life would be if I had believed that I am incapable of changing the circumstances of my being. It would be incredibly hard to live in an arbitrary society. That would likely lead me to the idea of nihilism.
Most don't disagree with that. The point is that the rate is different for different people. For some people, a decent live (house, bed, food) will take a lot of effort. For others, they might be born already into that.
What's important is that this is a discussion about policy and systemic problems. You can't address systemic issues with individual solutions (such as "poverty would be solved if people worked hard"), it's nonsense the same way it is to address individual problems with systemic solutions ("if you're homeless, ask the government to enact affordable housing policies).
That's an admirable life. But, then, there are people like me: Mostly lazy, but focused on creative expression, learning things, helping friends and family, and supporting community.
My life still has purpose. I just don't work very hard.
There are plenty of people working hard and making sacrifices who will never be well-off financially. Good work ethic is an advantage, but does not guarantee a good life.