We are agreeing. To expand:

What happened to all the women in tech fields? This office would make diversity/inclusion officers (who are modern additions to organizations) salivate, because current workplaces do not look like this slideshow.

I've spent most of my career in Telecom, this is how my experience in telecom is, AT&T got into equal opportunity early, and the notion stayed with the company past divestiture.

"What happened to all the women? This office would make diversity/inclusion officers salivate."

The OP meant, if you were to do a slideshow now, there would probably be considerably fewer women now.

The GP may have been saying, "What happened [recently] to all the women [that they're not around any more]?"