I think it's twee and manipulative too.
And a typical sign of the anitpathy people have towards children who are academically able. There is always a resentment towards them in a way that isn't seen towards children who are good at others things, and it's so prevalent in society today. Whenever a child is good at something academic, or much worse, if a parent happens to mention it, no matter how innocuous the context, people will try to tear down the achievement and say how unimportant it is compared to other things, or how early achivement always levels out, or how it's not because the child has worked hard if comes naturally, or whatever else.
Nobody says 'Don't worry so much about how tall your child is, worry whether they are kind to the lonely child' or 'It doesn't matter how good your child is at singing, it matters whether they are kind', or whatever. They are totally unrelated things, and there's no reason that people can't worry about them both.
Why not just say 'Parents should worry if their children aren't kind' or "parents should worry if their child contributes to the kind of bullying culture that results in lonely children', and leave it at that. No need to relate it to academics at all, other than to try to undermine children who are academic (or their parents), sometimes to make someone else feel better about not being as academically able. That is a totally separate issue. Teach your child to be nice whatever state their academics are in, and worry about academic skills separately.
But that doesn't come across as well on a twee meme.