Freedom always leads to some economic displacement. Cars replace horses, the loom replaces seamstresses, etc. Heck even programmers are worried about being replaced now by "vibe coding."

Society can't progress if we insist that a given model of economic production remains "fixed in amber" at a particular moment in time.

Closed borders creates disbalance, while open borders ensure humans are more balanced. Open borders inforces everyone to more empathy, since only a win-win deal will profit the individuum. Migration is only the result of unjust rules. When more people stand strong for humain rights everywhere, there is less pressure for everyone to move.

Probably noone is happy having to migrate.