With liberal parents, unless they have been gifted a talented child who does well, they just end up producing kids who can't function well and adapt to the very real stresses, setbacks and daily problems of real life. Conservative parents produce more resilient children because their parents believe in role models and objective realities over relativism and non lifestyle judgement.
With many liberal raised children as soon as they leave the nest they are floundering.
That's not successful parenting.
The whole point of parenting is you are raising someone who can succeed when you are no longer there.....Unless you have a child with cognitive set-backs (thankfully a small percent) that should be the expectation.
The liberal worldview doesn't have a good track record. I'll make the point here that I've also seen many parents who think of themselves as liberals and left wing but in reality when you look at what they do and their expectations for their children....you realise that it's mostly performative and done to fit in with their social groups.
As soon as it's something that costs them to be liberal......they just avoid it.