Until half of interior designers are male, interior design remains sexist. Lets break some ground and get more gents in there.
Point well taken, but I I think it's sidestepping a deeper issue. You're right, men and women are different. Looking at physical atributes - height, weight, strength - and it's pretty obvious: both men and women lie along bell curves, and the curves are not identical. To use a specific example, the average woman is going to be shorter and weaker than the average man. But the curves also overlap, so that there are specific men who may be shorter than specific women or specific women who are stronger than specific men. Saying "All men are taller than all women" would be pretty stupid. So would saying "All women are better interior decorators than all men." (I don't think this is what you were saying, I'm just using your example.)
All that means that, in my mind, the goal of reducing gender disparity in STEM fields should not be to ensure a 50/50 split between men and women. Such a 50/50 split may not be realistic for the same reason that expecting a 50/50 split between men and women in a breastfeeding competition is unrealistic: men and women are different. Rather, reducing gender disparity in STEM fields should be about reducing any artificial barriers - of education, socialization, institutional sexism, and outright discrimination - that keep out women who might otherwise love to be scientists. Likewise, we should move to reduce any similar artificial barriers that keep out men who might otherwise love to be interior decorators.
A real-world example: Recently, the US military said it would be allowing women to serve in combat roles. I don't expect that this will result in gender equality in combat roles, nor do I think it should. But It will remove an artificial barrier that prevented women from participating in an area where some might want to be (even if it's at a lower percentage than men).
As a side note, I think one of the major historic failings of feminism (something feminists like myself try to call out) is that sexism limits options for men, too. Sexism isn't just about women, nor is feminism.
The problem is that determining what those barriers are is difficult. Likewise, it may be impossible to objectively determine the 'natural' gender disparity in STEM fields or in interior decorating. A goal of a 50/50 split is easier to understand and can be applied indiscriminately to any situation, which is why I think it comes up so much. Then, it gets labeled as foolish, and rightly so, but without any discussion of the deeper underlying issues. Hopefully, though, we can move forward as a society to a point where there's just as much cultural and social support for a woman to be a scientist as there is for a man, or for a man to be an interior decorator as there is for a woman. At that point, maybe we can be OK with a 9/10 or 60/40 split, or whatever it turns out to be, because we'll be confident the people who want to be there can be there, and do well.