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Thanks to chatte's theory. There must be a reason on why sakura's symbol is appearing everywhere ..
I would rather like to say it is misinterpreted.
Kaguya had dojutsu on her forehead, while Sakura has Byakugou. In fact if we want to go a little deep both are related to two totally different sides of the spectrum. Concept of Byakugou is from Buddhism, while concept of Dojutsu and related jutsus such as Tsukuyomi, Susano'o comes from Shintoism. If you haven't observed it yet, manga has two different types behind concept of jutsus styles, one is jutsus having concept related to Shintoism, other having their origin in Buddhism, and both of them are exactly opposite of each other. I can provide few other evidences to support this statement, but common example is Shisuusenju(Buddhism) vs Susano'o(Shintoism).
It is pretty much interesting that sign on the palm of the deity which is behind Naruto is actually similar to Yang symbol and is certainly projects Yang side of this manga, which in turn is related to Haruno clan symbol, which probably indicates that Haruno clan(yeah, let's call it clan for awhile) is somehow on Yang side of this spectrum. U_U
Hence, I think it is misinterpreted.