My guess is because the people who found the Higgs boson, landed the lander on the comet, etc. are for all intents and purposes not well known: there wasn't a lot of fanfare for them so much as the discovery. As such, people are oddly upset about her getting praise for this.
I look at it two ways: one, what she did was not insignificant. Whether she received more praise than someone discovering something else that happened to be a guy, not a concern that is going to cause me to lose sleep at night nor is it something she should be punished for. Two, if her story getting bubbled up inspires girls (or anyone, I suppose) to get involved in or at least more interested in the sciences, hell, I'd say we're all better for it.
I look at it two ways: one, what she did was not insignificant. Whether she received more praise than someone discovering something else that happened to be a guy, not a concern that is going to cause me to lose sleep at night nor is it something she should be punished for. Two, if her story getting bubbled up inspires girls (or anyone, I suppose) to get involved in or at least more interested in the sciences, hell, I'd say we're all better for it.