No baby I have ever heard of had any better test scores, growth rates, or happyness because their parents were owners instead of renters.
Maybe not your experience, but many statistics would say that children of homeowners do fare better than children of renters.
Last week I was watching a PBS program on the U.S. “class” system and how different people of various steps on the economic ladder would have lifespans based on how well off they were or how badly off they were.
One of the things that perked my ears up was that the show stated that there was a direct correlation between healthier people/longer lifespans/successes and those who had bought their own home.