Barring certain extreme cases, of course, such as mental illness and such.
The stereotypical US things, like no universal health care, no tuition-free education, lax gun laws, mass incarceration, death penalty etc. are also a manifestation of this attitude.
You must take care of yourself, you must protect yourself, if you make it then great! If you become a criminal, you become subhuman and can be executed and treated brutally by the police. If you become dirt poor, that's your fault, you can become homeless, there's no welfare.
Now again, I'm exaggerating somewhat to emphasize what I mean. And yes I also know the historical origins of this mentality, and as I said, there are also positive consequences, like most major innovations and scientific discoveries coming from the US, the huge dynamic market where anyone can start a new company with manageable levels of bureaucracy (compared to most European countries) etc.