These talk page debates go round in circles. They simply don't want to include Chelsea's name, and they'll grab whatever policy they can think of to justify it. It's the same on every political article, where they'll find an obscure source that kind of says what they want and call it reliable, and disdain any that contradict it.
They say their want to prevent "harassment" of Chelsea. But how does posting her birth name affect harassment, especially when anyone with Google can find it anyhow? A far more public figure, Bill Clinton, is controversial enough that he likely gets nasty messages, yet his birth name is included. Or Elton John, another member of the LGBTQFAG community, has his original name in the article.
The massive debates over the article mostly happened a long time ago. The talk page archive is up to 48 entries, but
archive #43 is over ten years old, and indeed the archive
was up to #10 by 2006. Admittedly, though, cold fusion was a largely dead idea even then.
It's similar to Sarah Palin being the 7th most edited. Who has cared about her since 2008?