No one is forcing them to apply though. Your point would be totally valid if they were tricking people into thinking it was going to be better than it is, but they are totally transparent.
You could almost make the exact same argument about volunteering. You are asking for people to work hard and not get paid with the upside being they feel good about what they are doing. This is virtually the same thing, they are saying if the environment and lifestyle is appealing to you, and you're willing to deal with the downsides, please apply.