I have to say, as a linguist, that t-shirt is just wrong, It's not 'ni - kou - luh' but 'ni - kuh - luh'. Sorry for the lack of IPA, I can't be bothered to write it out and photograph it, but you'll get my point. I guess NS would also pronounce the 'r' in Sturgeon, but then many people wouldn't, including me.
As for Sturgeon on Isla the fragrant Bryson: ""Worst of all, I sounded like I didn't have the courage to stand behind the logical conclusion of the self-identification system we had just legislated for," she writes." So what does or did she really think? It's still not clear to me, and from comments I've seen she doesn't seem clear herself. But yes, it is absolutely a "logical conclusion" that one day she'd have to call a rapist female, and it's telling that she didn't follow through with it.