Most of your "evidence" has to do with kids moving between foster homes, or families running out in the middle of the night because they don't have money to make rent.
No, this is extensively tested and include educated, higher social-class and stable families. Make a consultation with a practicing psychologist if you doubt the dozens of studies carried out across nations in both the West and the East.
"Even AFTER accounting for family background and achievement at the end of kindergarten, mobile students had significantly lower reading and math achievement tests scores in seventh grade."
"Frequent relocation was associated with higher rates of all measures of child dysfunction; 23% of children who moved frequently had repeated a grade vs 12% of children who never or infrequently moved. Eighteen percent of children who moved frequently had four or more behavioral problems vs 7% of children who never or infrequently moved. Use of logistic regression to control for potential confounding covariates demonstrated that children who moved frequently were 77% more likely to be reported to have four or more behavioral problems"
If you're going to quote studies, you should cite then. Then we can pick apart what "mobile" means to your ivory tower researchers, which is almost definitely not "traveling the world as a healthy, happy, family unit."
Diplomats travel with their families. Employees of multi-nationals travel. US military travel. At least that last group (i.e. their kids) I know does better than average.
It seems to me that their survey intermingles two very different groups – the larger group, those who moved due to extreme financial insecurity (who would do MUCH worse), and those who moved under "positive" circumstances.
That is nothing like what we are discussing here.