Fine, why choose tech then? Are they biased? It simply doesn't make sense.
If they want to help women, they could perhaps start in an industry where it's most likely to be a problem (and I'd bet it's somewhere where women are doing low paid job). Here's why - we probably already know at least a partial solution, just look at what are the other industries doing. You don't get either information without a survey.
Work in tech.
So yeah, they are biased in wanting to get their industry in order. There is no ulterior motive, here, and no reason to get so defensive.
I think that these "unwanted sexual advances" may come from the fact there is power differential, i.e. hierarchy and bosses. Maybe we could try to eradicate that first, that is, have more cooperatives (democratically owned and run companies)? In tech, these would be pretty easy to set up due to low investment requirements..
Yes, "How are other fields doing" is a question that can be asked - but it is one of the least interesting ones. Suppose that every other industry is at 40%. Or suppose they are all at 60%. It doesn't change the fact that ours needs to seriously deal with it. (And as seen by ~1/3rd of the comments in this thread, is more interested in splitting hairs.)