Replying here @Analizer so as not to derail the original topic.
To me, the difference is that the topic you mentioned is open to all to reply to. If it was ‘Men, why are you afraid of sex toys?’ It would likely be picked up as gender biased, but as it is, it’s not.
We’re all human and far from perfect, so stuff does get missed but hopefully that explains it a bit 
PSA - this is just my personal view on it 