1.) Not encouraged in early years: If you are a tech-savvy female, "soft" tech careers (Graphic Design etc.) are generally recommended as career paths.
2.) It's a Boy's Club: If you make it past the college classes (with a 20:1 M-to-F ratio), you enter the workforce with (mostly) the same ratio. This means that unless you have thick skin & a good sense of humor, you'll never make it.
3.) You're Wrong: Even if you are right. And no one will hesitate to tell you why.
* Speaking for a professional career in Tech.
In my experience, a lot of these actually provoke you to strive to over-achieve & prove yourself. But I can see how it can seem off-putting for a new-comer.
I don't suppose you're implying the OP means otherwise?