The original question compares extra immigrants to doing nothing. It doesn’t compare extra immigrants to extra natives. Your suggestion that extra immigrants are better than extra natives is irrelevant to the question, even if true.
(And if I was a plumber, I wouldn’t want either extra immigrant plumbers or extra native plumbers. There is a reason that cartels try to limit the number of people in a profession.)
The original question compares extra immigrants to doing nothing. It doesn’t compare extra immigrants to extra natives. Your suggestion that extra immigrants are better than extra natives is irrelevant to the question, even if true.
(And if I was a plumber, I wouldn’t want either extra immigrant plumbers or extra native plumbers. There is a reason that cartels try to limit the number of people in a profession.)