There may be an argument about how the two are linked, but the -ism on display in the second photo is racism. The US built the suburbs quite explicitly to keep black people out by using poverty as a proxy, after the SCOTUS blocked housing segregation.
I think that you missed the point the post is making, which is that it is ironic to claim that capitalism saves us from having to live in drab cookie-cutter housing given what suburbia looks like.

You don’t have to live in those places. You choose to.

Can’t pay me to live in one of those.

The vast majority of housing in the country is that type of housing, meaning that the vast majority of people end up living in it, willingly or not.