The record is quite clear that Seven was conceived as a Borg first, "Borg babe" second. The idea of "Borg babe" was contributed by Berman
after listening to the pitch from Braga of a Borg character that had been approved by Menosky. From
https://memory-alpha.fandom.com/wiki/Seven_of_Nine#Background_information:
The concept of Seven of Nine began while Brannon Braga was sitting at home, late one night, and saw a televised promotion for the Borg-centric third season installment "Unity". (Braving the Unknown: Season Four, VOY Season 4 DVD; Cinefantastique, Vol. 30, No. 9/10, p. 75) The idea of having a Borg crewman aboard the starship Voyager – a notion that instantly appealed to Braga – occurred to him as he was watching the advertisement. (Cinefantastique, Vol. 30, No. 9/10, p. 75) He then brought the character concept to the attention of fellow writer Joe Menosky. Braga later remembered, "I called Joe Menosky, and pitched this idea, and he thought it was a great idea. And then we talked about it and all the things… 'What would that mean, to have a Borg character?' It would be really cool." (Braving the Unknown: Season Four, VOY Season 4 DVD) Braga also related, "I called Joe Menosky and we brainstormed. I wanted to make sure it wasn't a stupid idea." (Cinefantastique, Vol. 30, No. 9/10, p. 75) After Menosky approved of the concept, Braga called Executive Producer Rick Berman. "It was late, but I was so excited […] He really liked the idea but he had the stroke of genius, 'Make it a Borg babe,'" said Braga. "And we just talked about it, for a couple hours, and we just thought, 'This is a really cool idea. This could be really... just the thing we need.'" (Braving the Unknown: Season Four, VOY Season 4 DVD) This marathon conversation between Berman and Braga took place in the spring of 1997. (A Vision of the Future - Star Trek: Voyager, p. 348) Berman was not the only executive producer to whom Braga suggested the idea of a Borg crew member, however. "I […] took it in to Rick Berman and Jeri Taylor," Braga said, "and they liked the idea." (Cinefantastique, Vol. 30, No. 9/10, p. 75) Taylor herself commented, "The idea of having a female Borg was one of those that came largely through spontaneous combustion. It started with Brannon, and quickly gained a great deal of support." (A Vision of the Future - Star Trek: Voyager, p. 348)
This contradicts your assertion that that "everyone" involved with the creation of the character had created Seven in order to bring sex appeal to the show.
Also, it's good form to refer to women by their surnames when you refer to all the men by their surnames, especially when you don't know them.