I always feel sick when I see one of these threads pop up. You have a whole bunch of people raising concerns for children whose parents may not have their best interests in mind, and then you have a whole bunch of people who obviously do care very much about their children taking it personally and sort of standing in the way taking offence.
There ARE people using HE as a very convenient shield for abuse. This does not imply anywhere near all or even the majority are, but SOME are, yes.
My father was one of the 'off-grid, don't trust the world' HE'ers, and sought complete control over the whole family (down to making you do 'favours' for food, and controlling the light/heat/water in the house on a reward/punishment basis).
He completely isolated all of us (including my mother who was a teenager when she married him), and spent years physically, emotionally, and sexually abusing us. It only came to an end when one of us nearly died, hospital was the only option, and the whole house of cards came tumbling down.
I was in that house until nearly an adult, and was so frightened of the outside world (believed it to be more dangerous and worse than anything in the home, thanks to my father) that I didn't know there was any chance of outside help.
Some HE children do NOT get any opportunities to socialise - we didn't, it was used deliberately to isolate us as much as possible.
Some HE children do not get to see dentists, doctors, etc - we didn't, many terrible repurcussions from this for many of us.
Some HE children are not being HE at all but are being hidden at home in order to be abused - we were.
I really, really wish that these families could be successfully identified and supported (fucking prosecuted in our case), and that all the loving HE parents doing the best job they can could realise that you are actively standing in the way of families like mine getting help when you react so defensively on behalf of all HE families.
Some HE children DO need rescuing. I wish we had been.