I think the PP have covered it when talking about fear of judgment. My DM and her family grew up in a working class area that was seen as “really rough” even within an already “rough” town.
My GM was absolutely impeccable in every way. Her home was spotless and always decorated perfectly, her clothes were kept on hangers with protective bags over them, shoes in the shoe boxes, hairdressers for rollers every week etc.
She was really strict about appearance and my DM was definitely a “dress and plaits and bows” child. My GM herself had grown up in such absolute poverty that she couldn’t stay on at school because her own parents couldn’t afford school shoes and uniform. That has to have an ongoing effect in terms of worrying about how other people see you and the way you are dressed.
My DM moved away from there and married someone from a different background. But the hangover from her own childhood is still there and comes out when she says things like “You can’t let a child out in odd socks, what will people think?!”.
The “What will people THINK” is a real theme. I remember her once faffing and tidying around before I had a visit from a health visitor , after one of my DC were born.
I was saying to her “the health visitor really doesn’t care if my house is messy” (normal level of “just had a baby” clutter, nothing alarming). But it was clearly something that mattered to her, and she is was concerned about what the health visitor would think.
I wouldn’t care about someone judging my parenting due to an odd sock (or, god forbid, double denim 😂) or worry about what any visiting professional might think if my house is a bit untidy, as I’m quite secure in myself and my parenting. Then again, I have grown up always having the things I needed, maybe I’d feel differently if I hadn’t.