If you think I didn't rtfa because I didn't mention that nintendo asked valve not to list dolphin, you are wrong.
If you rtfa, you'll find that the first part of the email nintendo sent valve said that dolphin circumvents encryption, which is illegal under the DMCA. If dolphin were to strip the circumvention code, then nintendo would have no legal reason to ask valve not to list dolphin, and valve could ignore the request.
> valve said that dolphin circumvents encryption, which is illegal under the DMCA
The article explicitly mentions that the DMCA has an exception for interoperability that they believe applies to Dolphin:
> ...a person may develop and employ technological means to circumvent a technological measure, or to circumvent protection afforded by a technological measure, in order to enable the identification and analysis under paragraph (1), or for the purpose of enabling interoperability of an independently created computer program with other programs, if such means are necessary to achieve such interoperability, to the extent that doing so does not constitute infringement under this title.