Some of the reasoning in this post is very weak. It's not very long, and its kernel is an anecdote about how her son is interested in programming and her daughter in photoshop. My daughter is also more interested in art than my son (who is more interested in video games). Both would make exceptional programmers, and both have a latent interest. Both are setting a course for STEM careers, but, like all 18 and 16 year…
Only if you believe in diversity for diversity's sake, and it's important to realize that not everyone does. Personally I'm much more concerned about equal opportunity for underrepresented groups than what my coworkers actually look like.
If you really, really care about diversity it's very easy to be involved. I can guarantee you there's a program to teach computer skills to young students (often those who are economically disadvantaged) in your city.