Skewing heavily male I will grant you, but not even close to being majority white in almost all cases.
But that puts it right in line with your average computer science or software engineering cohort at any given university, so I'm really not sure what your problem is.
Like I get you might think it's unfair there aren't more women in software but I'm not sure what you want us to do about that my dude.
We can't just force more girls into software if they aren't interested in it.
Closest thing I can find that seems relevant in there:
"Compared to overall private industry, the high tech sector employed a larger share of whites (63.5 percent to 68.5 percent), Asian Americans (5.8 percent to 14 percent) and men (52 percent to 64 percent"
First point would be that doesn't really support your contention that 90% of tech employees are white men.
That said, they can't be measuring what we think of as tech; it's certainly more than the claimed 64% male. I'm pretty sure that restricted to actual tech, it would be both more male and less white.
HR roles, like most others, are numbers driven. Recruiters are expected to deliver a number of applicants, interview a number of candidates, etc. This means that yes, they often interview people they have no intention to hire: It makes the HR person look good.
This can happen if they have a diversity hire directive but interview non-diverse candidates, but it can also happen if they want to hire a white guy but have a company directive to interview diverse candidates for every role. Either way, they can say they looked at everyone before hiring whatever candidate they wanted.