Yeah... and if they have any "proof," it's way too complicated and far-fetched. Like how even though Kushina told Naruto to find a girl like his mother, they pull out some random quote where she tells Naruto she hoped he didn't turn out with any weird quirks and say, "Yeah, because she totally wanted a girl who had the characteristics of herself that she hated."
First of all, that's out of context.
Second of all, she said find a girl like your mother. Sakura is compared to Kushina by none other than Kushina's own husband.
END OF STORY
Aaand, that's just one example. Stop making things more complicated than they are! Kishi likes parallels, but I don't think he's invested enough in the romance to make symbolism and parallels as complicated as people (NH/SS) make them out to be
SHINACHIKU

The strong-willed, intelligent and powerful yet loving, tender, and sensitive heartthrob of Konoha.