Why is this wrong - or is it? Seems like a pretty normal reaction to being attacked? Is it wrong because a woman's statements always have to be believed?
Some of her claims are objectively verifiable - e.g. women dropping from 25% to 3% of the SRE teams. That sounds like a serious, systematic problem - not a coincidence.
I'm not saying she is wrong, just asking why is it wrong to investigate her claims?
Although the numbers you cite are not really evidence of a problem imo - there could be any number of reasons. Assuming sexism is the only explanation is heavily biased.