The original comment was saying that in NSW, that even after a " name change", the original name at birth remains on specifically 3 documents:

Birth certificate

Death Certificate

Marriage Certificate

I think the implication the commenter was trying to make was that even with name change, you can't completely scrub your old name away.

If the parent LEAVES the name as-is, then yes, it's a SUPER shitty thing to do. But in the article, it makes it clear that the family is already getting the name changed.

So, of the 3 documents, the death certificate can't by definition ruin the kids life. And, how often do you need to show someone your birth certificate?

I took trading to become a wedding officiant, and in my jurisdiction it is also the case that legal name changes don't affect birth or wedding certificates... and we learned that it is bizarrely common for people to be unaware of their own name as per birth certificate. An odd spelling or a pet name that stuck. Bradly vs Brad. Etc. It's crazy that many people have never actually seen their own birth certificate.