Yes, the things the OP lists has nothing to do with middle class (or any other class), OP hasn't said this is something all middle class people do or that all middle class people are like this or are shite/"bohemian" parents, but those that are tend to be looked on more favourably than those that are viewed as working class or poor.
If we want to look at actual murder of children, there is a marked difference in the reporting and response to it by a range of demographic factors, perceived wealth being one of them. Looking through various news reports and the comments to them gives a trove of evidence.
Social services don’t turn a blind eye because the families have money. They have a statutory duty to investigate any complaints made! if they aren’t made aware of issues they can’t investigate them.
What is legally meant to happen and what social services have capacity to do are often not the same thing, and really, social workers are humans and therefore have their own biases and saying SS doesn't do this or that is to ignore them. We can't fix what we don't admit is an issue.
I experienced it time and again. Part of that was likely an overstretched system, but part of it was bias. I had a counselor once discuss in my earshot how hard she'd worked to get therapists into school because she had found kids failed because of how the area we were in was viewed, kids like me who spoke out were labeled 'dramatic' and not taking enough responsibility, and I know schools now, in the UK, doing the same thing with the same reasons - everything is overstretched, but also many are finding it harder in some areas to get anything noticed because there is a view that parents there aren't a problem to be bothered about and the kids are blamed and suffer as a result.
Interesting points on here, I suppose it is also how much these behaviour impact on life chances really.. In a small flat with drunk parents, no where to escape too.. No culture, education, no thought about how to parent compared with educated people who do consciously parent, educate support education and maybe drink but the child has space to retreat too and it doesn't impact them?
While inadequate housing can cause issues, I've seen no research into Adverse Childhood Experiences like parental substance abuse that suggests having a bigger house/bedroom has any sort of relieving effect. I guess it might be possible, but I've not seen data on it.
And really, that's a very false dichotomy. There are plenty of people in big houses who do not give a fuck about their parenting (I've had several including my own father admit it to me - cared more about his friends and coworkers which is why he has more drug arrests than I've ever had drinks) and plenty in small flats do.