Again, context matters. When a man makes a sexual joke and a woman makes a sexual joke, it's not the same thing because there are different implications to it.
Women are often sexualized and/or objectified, specifically by men. When a man makes a sexual joke, even if he is not directly sexualizing a woman, that can make some women uncomfortable, because of the societal context behind it.
Tech conferences already have kind of a bad reputation towards building an inviting atmosphere for women. Now imagine you are in a place where you might feel a little bit vulnerable, and you hear something like that. It's easy to take it the wrong way, regardless of the intent behind the joke. All this is completely ignoring that in a professional settings, these kinds of jokes are inappropriate anyway.
Women are often sexualized and/or objectified, specifically by men. When a man makes a sexual joke, even if he is not directly sexualizing a woman, that can make some women uncomfortable, because of the societal context behind it.
Tech conferences already have kind of a bad reputation towards building an inviting atmosphere for women. Now imagine you are in a place where you might feel a little bit vulnerable, and you hear something like that. It's easy to take it the wrong way, regardless of the intent behind the joke. All this is completely ignoring that in a professional settings, these kinds of jokes are inappropriate anyway.