Especially the parts about someone teaching you trade and borrowing tools so you can show up like pretending to be pro instead of like someone who never done that trade. Or relative helping you get job and teaching you on the job. Smart person can learn basics fast, but can't figure them on his own and need someone to cover up basic mistakes at the beginning.
And also ability to find a place to sleep in shared with other non complete strangers (e.g. People you know something about even if a bit) - not as comfortable nor with privacy but cheap and provides connections.
The shared housing was common enough that Americans attempted to prevent it in places (via rules on multiple families in one house etc).
Culture aspect is real but it's highly localized, even to immigrants, meaning you don't get help from "your people" just because you share the same origin.