I don't think the different interests group is being remotely dishonest. Their started claims are pretty consistent with what you would expect from someone who is skeptical of the discrimination hypothesis. Namely if discrimination isn't the primary driver of gaps in tech, pushing for equal representation is going to pressure some women into jobs they don't really want and prevent some men from getting jobs they want. As for dishonesty, the discrimination hypothesis group can't even seem to debate the issue without misrepresenting their critics and accusing them of bigotry (for example, the reporting and comments here regarding the Google memo). I don't want to get into a tit-for-tat, because I'm sure discrimination skeptics have some pretty silly or dishonesty arguments as well, but dishonesty seems like the rule for discrimination hypothesis folks, not the exception. I'm happy to agree to disagree on this point since it's not likely to go anywhere productive.
Regarding the "just look at other cultures" point; that actually supports the different-interests hypothesis, because those other cultures are almost always those cultures with the least gender equality. The countries with the greatest score on the gender equity index have larger gender occupation gaps. The discrimination hypothesis actually fails to explain this, while the different interests hypothesis does a pretty good job.
Lastly, given that women achieved parity with men in law and medecine in the 80s and 90s (fields during a time that were far more hostile to women than now); women didn't need special programs, diversity officers, scouting programs, pipeline investment, etc, none of which are significantly helping tech now. The discrimination hypothesis fails to address this as well.
Hopefully this at least makes it clear that there are legitimate reasons to be skeptical of discrimination. At worst I'm simply wrong, not dishonest.
Sorry for typos, sending from phone.