Why not more female sanitation workers or more male elementary school teachers? What makes the gender demographics of building websites so much more important than all these other imbalanced fields?
Or coal miners! /s Seriously, the answer is the same as why half of the planet wants to be in tech, money, success, and influence. The general thinking is and has been that you try to fairly populate the mid-top range of jobs, and that's more effective than trying to shoehorn in more women driving dumpsters.
This is said every single time this comes up. People need to learn how to use a fucking search engine.
http://www.rigzone.com/news/oil_gas/a/135815/API_Study_Getti...