Amazing. So its not sexist because of two reasons. First, its that women wanted this. Second, its because it brings a benefit to them.
If women wanted to do this freely, then goddamn right they should be able to wear the scarf. If you honestly believe that women want to do this, then explain why they are whipped and or thrown in jail for not wearing the hijab. If women want to wear it, then its their right as humans to do so. Your argument falls apart because they are not given a choice. This is forced upon them because they are women. That by the very definition of the word fits here. Amazing that your argument is that the right to choose is taken away because others want it and therefore its not sexism. Disgusting position.
Next argument. Some people disagree with you and they should have the right not to wear a hijab. Even assuming your premise that women not wearing it are sexually objectified, it should be the woman's right to choose. Your argument is very literally that women should not have the right to express themselves because others cannot control themselves. In your mind, because a large section of the culture feels its inappropriate then all women must not have the choice. Equality is about letting all people choose for themselves. Your argument is literally that women not having this choice based solely on the fact that they are women but its okay because the benefit is that they will be less sexually objectified. I say less, because they will still be objectified in a culture where women are forced to marry. The fact that sexism still exists all around the world is irrelevant to the fact that this situation is also sexist.
But you will no doubt deflect. Monggrel, I hope you see the situation for what it is. People are literally defending the actions of Iran as okay and not sexist. The right is falling apart for good reason. The left will not be too far behind with this shit double think.