I'm sorry to sound harsh, but I fully disagree. This is making the exact same mistake as the GP.
> the safety net comes in the form of saving money wisely
This FULLY ignores the many reasons that make it harder so save money exactly BECAUSE you don't have a safety net. A genius born into a bad environment with some medical preconditions might never be able to save ANY money due to needing to spend it to stay alive.
And that's not even looking at the many very expensive aspects of being poor like preventative care.
> making the right friends who can give you some work to fill in the gap
Right, except that poor neighbourhoods have fewer people able to employ you. So you're either lucky to meet the right people and have them like you (!) or you move out of your poor neighbourhood with the money you don't have.
> being willing to be underemployed for a period of time while you get back on your feet
Okay, and how will this help anyone pay their bills? Should people just say "guess it sucks I can't feed my family, but they just gotta power through, soon it will be worth it"?
---
Please don't read this as me saying that things like safety nets are 100% absolutely luck-based. But it's incredible to me just how much people are willing to look at "what they can do for themselves" without being willing to see why the same could be harder for people in different situations.