The Saiyans are a human-like alien species with tails that lived on a planet with 10 times gravity, at least until some asshole blew up their planet. They were also menaces to all life in the universe.
There’s hands-off parenting, there’s parental neglect, and then there is sticking your baby into a growth chamber for a couple of years until they’re old enough to walk and talk and then sending them off to a hostile planet to kill all of the lifeforms on it. No exaggeration. And then we get into Zenkai Boosts, which result in Saiyans getting stronger with every near-death experience that they have. This includes children.
If you find that your child is a weakling, no sweat, just send them to another, “weaker” planet and see if they survive or not.
If Saiyans didn’t have such good memories, then there is a good likelihood that they would never know who their parents are. Assuming that they have the same psychological needs as humans, of love, belonging, and security, I do not think it is an exaggeration to say that every single Saiyan raised in this culture would have a severe mental illness of some form or another.