It's too bad that no immigrants work in construction to build more housing. If we could import lower cost laborers to build houses, that would greatly improve the housing affordability problem, but sadly, every time I go past a construction site, all I see are white guys whose great-great-great grandparents came over on the Mayflower.
Your parent was trying to be sarcastic that native WASPS are above working on construction sites and only migrants can do that.
Here in the EU where I was talking about, it's different, it's mostly European whites on construction sites, not WASPS, but intra-European migrants from balkans and eastern europe.
So here we literally gained nothing from the mass migration from africa and middle east except more housing demand instead of more skilled labor for building houses, contrary to the pro-migration propaganda.