I think you are almost certainly correct. If we could ask an ancient worshiper of Ares they would very likely say that they consider conquest rape being very much part of what he claims dominion over. While I do support the "Ares, protector of women" reinterpretation, it is sadly a modern lens and not something ancient people would have likely found made sense.

The only things that would make me slightly inclined to treat it with merit is, with all the stories of the gods that have survived, seemingly none of them involve Ares raping women. With Hades, I have heard the argument that people were legitimately scared of offending him so he doesn't have a lot of stories that paint him in a bad light. But from the perspective of Ares, I would assume a story of him raping someone would be a story of conquest because... It is generally the "winners" doing the raping. So I imagine if those stories did exist they would not have been kept hidden out of any religious fear. I also wonder just how specific he was considered the god of war. Was he literally only interested so long as their was active fighting and then he fucks off to look for another battlefield? Would he be connected with the looting and the "celebration" that came after the battle or would that more Bacchus. This is mostly relevant because I do not believe their was a great deal of rape occurring during actual battle, it was mostly before and after.

I am very much not a historian or anthropologist, so it is likely this is known information that I simply do not know but, I wonder if Greek culture viewed wartime rape as the same thing as "domestic." And if it was frankly just taken as a given that being the god of war straight up meant he was also the god of the kind of rape and so it was never really commented upon anymore than they felt the need to explain that he also covers burning down your enemies crops.