Because none of the professions you're talking about are generally well paid. IT is abundant in jobs that are:
- Well paid
- Well respected
- Have no apparent attributes that make one gender likely more capable in the field than any other gender
And yet there's a massive gender gap in this industry. Nobody really knows why. I've worked alongside men, women, different races, different ages, and I can't honestly say I've noticed any particular group showed signs of being more capable than any other group. I've known terrible women programmers and awesome women programmers. I've known terrible men programmers and good ones. Races? Tougher, as I've worked alongside very few non-whites (is this gap being addressed too?) but the people I worked alongside who weren't white were good.
So we have a respected, well paid, career path, that is superficially accessible to all, and yet at least one identifiable group making up 50% of the population sees it as inaccessible, or avoids it for other reasons. We should be concerned.