I don't doubt that there are more adults buying the animated stuff than they suspect.
I think Hasbro's probably pretty savy about who's buying their CW figures. There are surely some guys buying, but it's really the vast minority. The proof is really in the pudding that the line's doing insanely well, and it's rarely getting "new" characters. That's solid evidence as to who is supporting the Clone Wars figures. Collectors pass on the repacks, but kids are sucked in.
Comparing Satine and Shaak Ti isn't totally fair either... Shaak Ti's an alien, a Jedi... These things play into the mix. A more close analogy is Padme and Satine, and Padme (Anakin's wife, and an integral figure to not just Clone Wars but the Star Wars Saga overall) does dismally at retail. There's absolutely no reason to assume Satine would be ok then, but I get the desire for her.
It's a weird place where the line is right now. The "collector line" is actually a whole separate line, and the kid's line is basically Clone Wars (and Legends, though I think some collectors are expected to support it too, but that's dwindled). In the past, the collector line was just better poseable figures with cooler accessories and stuff, while the main line aimed at kids were figures with action features, and giant missile firing cannons and crap.
I do think there are some adults really geeked on the animated line, but I just don't think they're a drop in the bucket compared to who is putting the most money in. And Hasbro said pretty clearly there that they don't want to risk anything bogging that line's sales rates down. One figure screwing up one wave... They're avoiding Yularren situations I guess.
And it does suck for the adult collectors of the line, but I don't think Hasbro's misguided in their thinking is all. With the realistic line they could strike a balance. I don't think they can do that with a line that seems to really have the support of kids propping it up.
Ultimately though, kids are needed for both lines. Maybe as time goes on, the CW line will be able to have a better balance to it too? Right now it's really such a cash cow though, it seems, that Hasbro doesn't want to mess with that.