I think it's perfectly natural and likely very common to feel more protective of women than men.
I would not like to feel that a young woman I've brought in to the world and been responsible for suddenly has to make a decision between financial sacrifice and ensuring that she has a safe roof over her head. I wouldn't feel quite the same about a man. In addition, I think women tend to feel less negative emotion about being supported, so are able to accept that support more positively, whereas men tend not to, on average. I think as a result, women are less likely to be detrimentally impacted from being given that support than men. I also don't believe women need to be taught quite the same lessons as men at every stage in their lives.