I think the parent would have drawn the same criticism if the exclusively marketed towards men.
I think his point was simply that their marketing misses 50% of the market. His point is not that it's wrong to only market towards women, his point was that it seems weird from a revenue perspective to only market to to half the population.
A lot of products start with half the population, though, and it's not considered weird. The old euphemism is "shrink it and pink it" - originally design for men, then put out a women's version.
If Spectacles take off, they can always "grow it and bro it" later. Starting off with a focused target market seems like a reasonable approach to me.
