Yes, it is, Mehitabel. But it's not obvious what anyone can do, still less employers.
The pattern I've seen on several occasions is a nervous mother, sometimes with a suggestion of undiagnosed mental health issues, who projects that insecurity onto their (often only) child, and where for good but misguided reasons the father joins in and if the child does something to "upset their mother" blames the child. Sometimes the gender roles are reversed, but it's unusual. There are sometimes religious, cultural or other complicating factors to make it even more difficult.
If you went over to AIBU with "my neighbours are stifling their child and won't let him do age-appropriate things" the usual taboo about "criticising their parenting" and "your house your rules" would kick in, and inaction would be recommended. Social services are unlikely to be interested, and it's not clear what they could actually do. And by the time the issue reaches a real head, over university and employment and so on (as 5foot5 recounts) then everyone is an adult and unless guns and violence are involved no-one is going to intervene. There's a real asymmetry that we are now very aware of the factors that mean that "why doesn't she leave her abusive and controlling husband?" is a stupid question (money, housing, networks, family) but the same of parent and child isn't seen with anything like the same sympathy. There was a shocking thread on AIBU a few weeks ago about someone who wouldn't let their child go on school trips because of their (the parent's) anxiety, and a horrifying number of posters said that was fine.
But by the time everyone's an adult (and, in this case, in a job which today would pay mid-forties) you have to assume some agency. And I'm afraid I wasn't prepared to accept that a graduate taking home more than many households had no choices and couldn't just rent a flat. Yes, as my previous paragraph says, conditioning, co-dependence, FOG, etc. But I am resistant to the argument that people are entirely the slaves of their upbringing, and I am particularly resistant to the argument that adults have to seek their mother's permission to do things at work (I have, as you can imagine, simplified the story for dramatic effect, but there was a backstory of similar goings on including her phoning up to demand that I stop asking her son to do "things he hasn't done before".)