Experts have ruled that San Diego's population growth fueled by immigration is not good for the city. The majority of last year's growth is attributed to the county's net gain of 24,226 immigrants, both legal and illegal. Some experts argue that relying on immigration for population growth is risky and could harm the workforce. However, one expert believes that population growth driven by immigration is better than no growth at all. This comes as San Diego is experiencing a significant drop in border crossing after the end of the CBP One appointment system.