I agree. I posted previously and it depends on the man/woman and what they find 'sexy'.
Showing too much skin does can go against the Lolita style. It's just beautifully feminine.
Almond Milks
Famously Deranged
I don't believe that a "Sexy" or "Sexually Attractive" Lolita isn't a Lolita. It's simply a different styled Lolita, just like a Goth/Victorian/Kawaii Lolita, Its simply categorized like every other type of Lolita. Just because some people like to show some skin doesn't mean they aren't any less Lolita than any other one.
Sexy doesn't have to mean showing skin, that's not the kind of attractive we are talking about. Skimpy clothing goes against most lolita styles aside from ero, so yes, if someone was showing off a lot of skin it probably would go against the lolita aesthetic.