It's certainly a concern for those who understand that they would just be raising economic cannon fodder for the greedy, privileged, parasitic rich to devour. For most, it's just the fact that they themselves are being devoured. It's like the indigenous South American tribe who were enslaved by the Spanish and forced to work under such brutal conditions that they voluntarily refrained from sex in order not to subject children to such a life, and became extinct in a few decades.
And many younger progressive women still refuse to see any connection between the unaffordably high housing costs in the bigger city areas where they want to live, and the country's immigration policies, which they support.