“So it might be a fair Taana to claim that women not saying Sheva Brachos is just Al Pi circumstance (women couldn’t read for most of our history)”
What does reciting a bracha have to do with learning how to read? women have been lighting shabbos candles, going to the mikvah, eating food and reciting brachos on these for thousands of years. The gemara discusses women being motzi men with birchas hamazon. Clearly, reciting a bracha and the ability to read are not dependent one on the other. Moreover, who said women couldnt read in the time of the aruch hashulchan? They already printed seforim such as Tzena Urena for women, would have been pretty useless if they couldnt read.
I only brought the Aruch Hashulchan (who says it is implied in the Rambam) for the purpose of showing a source the birchas chasanim should be recited by someone other than the chosson (and I suppose by extension, the kallah). If one wanted to call up aunt sarah to recite one of the brachos under the chuppa, that would be an entirely different discussion.
This particular thread addresses the situation where the chassan and kallah jointly recited two brachos under their chuppa, the Aruch Hashulchan writes clearly that the minhag is for someone other than the chosson (and kallah) to recite these brachos.