@APY/Daas –
Ah, Baruch sheKevanty!
I looked it up and he basically says the above reasoning I mentioned, that by Nashim (i.e. singles – he clearly quotes the A”R reason of “k’gufo” and asks the above points: that it only pertains to married women ) we are not machmir to be Mehadrin like the Rambam’s shitah
He claims that the Ikar haDin is like the sefardim do, but we are machmir like the Rambam as a per mere “minhag” that all light, and thus the very “minhag” when initiated was never applied to Nashim in the first place , the reason they are not machmir (especially if not like the Rambam who holds Nashim are incl in Mehadrin – see Pri Chadash) he uses the term that they are טפילות which is not at all the term of k’gufo’, it means that their very Chiyuv is based on “Af” hen Hayu BeOso haNes’, hence we are not Machmr on the “Minhag” to do the other shitah of Mehadrin.
Makes perfectly sense now why Nashim are exempted from lighting their own.
Here is the link:
http://hebrewbooks.org/pdfpager.aspx?req=1305&st=&pgnum=139
http://hebrewbooks.org/pdfpager.aspx?req=1305&st=&pgnum=140
I always say, most questions and difficulties are solved by looking up the sources. May it be Rashi quoting a Midrash or a Toras Kohanim etc. or anything else, you need to look up the source to find the true meaning.