Earlier quoted context omitted.
I think the idea is that "only support your family" harms everyone. The example, Alex, has 2 kids, works manual labor to earn poverty wages, and is depressed. Which one of the types of teen do you think his kids will be? The common refrain is "then he shouldn't have had kids" but unless you're going to create an authoritarian state people will always have kids (and restricting kids went awfully for China anyway).
Convincing people that their problems are outside of their control and that the only way to solve them is to vote a certain way is also a form of authoritarianism. If you aren't to blame for your own life that implies you have no control over it.
There are a number of systemic barriers, one of the big ones mentioned in this demonstration is education.
If we had equal baseline access to education, housing, healthcare, and food... then sure, if people stayed impoverished I might begin to agree with you.
We're not even close in our current state so "you're in control of your own life" is a completely ignorant argument.