I'm fairly certain that the aggregation of jobs described as "tech industry" in this statistic are a rather different collection of jobs pre-mid 80s and post-mid 80s. Not necessarily because of people massaging a statistic(but many people no doubt would be happy to overlook the previous supposition in making a case,) but because the nature of most jobs in computing has changed with the advent of personal computers. In the punch card era many "tech jobs" were more secretarial/office management/accountancy roles, nowadays with the explosion of computing devices there are many more software development and hardware engineering roles.
Engineering, broadly speaking can be seen as a "tech job," was there ever a time that the various fields of engineering weren't male heavy?
With that said, if you look at the tech industry
What about other industries with even more skewed sex ratios but fewer or no high-profile articles about sexual harassment, what's the cause in those industries?
the constant stream of reports of sexual harassment and sexist treatment from women that actually work in the industry is a pretty big clue that this industry, maybe, just maybe, has a problem with the way it treats women
Has anyone put to an analysis that these sort of events occur more frequently in the tech industry, rather than the tech industry is high profile and thus these events get more attention?