If people have children without regard to their finances, humanity won't go extinct, but there is likely to be increased suffering and anxiety along the way.
Birth rates go down when people are in a secure situation. The solution isn't to make having children hard through impoverishment. That increases birth rates further.
Besides, in the case of this Somalian man, in subsistence-oriented societies having more children is often economically advantageous.
It's not in that article, but that driver is affiliated with the Drivers Union, an advocacy group for drivers with backing from the Teamsters 117 union, and this is not the first article that he's been covered in, so is presumably well-known to others advocating for drivers.