It might sound bad, but technically immigrantion brings the best people, and leaves behind the rest. Immigrants tend to be the middle class and better educated from those nations.
If these people are so qualified why are there so many issues in their countries, how does the west know they won’t bring the problems with them,
Often the systems in their nations are broken, or socialist, etc. Those who can get out do so. When given freedom most people can thrive, and population is an asset.