It doesn't really make sense to "treat everyone the same", since different people have different needs. Not everyone needs a wheelchair, but some people do, for example.

That's a strange thing to pull out of my mouth, given what I said. If you're trying to say that gender shouldn't be a factor in determining a person's needs, then you're obviously wrong. Cis men don't need access to feminine hygiene products, for example.

You'd obviously want to take into account as many factors as possible when trying to work out a person's needs relative to someone else's. Socioeconomic background is a good start, but obviously doesn't capture all of the relevant variables. A trans person can come from a middle-class background, but be at a higher risk of bullying than the other middle-class children at a high school, for example.

On this particular point, I think it's because STEM-like fields are quite economically useful compared to the arts. On average, it would probably "hurt" men (in financial/power terms) to encourage more of them to go into the arts.

A lot of the male prison population usually have mental illness, sexual assault histories, were raised by a single parent (often the mother) or more generally a broken home. It's not ideal, but if we encouraged more male teachers into the early education system, perhaps young boys would have a good male role model to look up to.