Yennifer, I think I get some of what you're saying. It's possible that the initial OP, the one on the other site, was really an EP who was trying to influence young parents/AC. And that they decided they could do it best by posing as an AC, that other AC would be more likely to accept their message that way.
But, IMO, it's also possible that the OP was a formerly abused child who resents it when other AC go NC "just b/c" their parents are nosy or embarrassing sometimes. I can see where they might think that their situation was so much worse. And I can see where they might think that if they could forgive their abusive parents, other AC should be able to forgive a mum (or dad) who was "merely" intrusive, etc.
They also mention that "first time" their DD told them they were "mean," etc. If it was just b/c they insisted on DD's doing HW (homework) or something before going on electronics, then I agree that reaction is just a typical kid response. But that hardly compares to a parent who constantly embarrasses their child or who can't step back a little from their AC's life. Maybe these things aren't on the same level w/ the OP's abusive experience, but they are not on a level w/ a kid getting mad about having to do HW or whatever either.
Besides, I don't think the OP has the right to judge anyone else' feelings. Or to dismiss those feelings. In fact, that's exactly the kind of thing I've seen many EAC complain about (here, on MN, etc.). And as I said earlier, I don't think it's very productive to tell anyone to "get over it."