>It refocuses the issue to gender and suggests you're special in tech...
I think one of the purposes of these kinds of separate events is to make it so that women in tech are not "special".
>I think this devalues the accomplishments by focusing on an unimportant aspect.
Unimportant to you, maybe, but not to the people who face barriers because of their gender. To make an analogy, is the success of some African-Americans today "devalued" because they didn't have to work as hard for it as the "exceptional blacks" of previous generations?
>It subtly suggests (unintentionally) that girls can't make it on their own and require this extra help...
One of the benefits of living in society instead of striking out for the frontier is that, when the deck is stacked against you, you can band together to solve problems that might be too hard to face on your own. Yes, there are always "exceptional" people who can go it alone, but the fact that _somebody_ didn't need extra help doesn't mean that _nobody_ needs extra help.
>I don't think excluding people by sex is necessary.
Necessary for what? In an ideal world, you wouldn't have to take gender into account, but (imperfect as it may be), I think women-only events are a way to create environments where gender issues don't come into play.