I think what they mean by "not diverse enough" is in comparison to the pool of candidates. Under the hypothesis that race/gender/ethnicity/sexual orientation/na

I think what they mean by "not diverse enough" is in comparison to the pool of candidates. Under the hypothesis that race/gender/ethnicity/sexual orientation/nationality/age are uncorrelated to performance/ability of the candidates, it implies bias in the selection process. Which isn't only an ethical concern, but also a business one: it means they're not hiring the overall best candidates. Of course, there's also something to be said about the lack of diversity in the pool of software engineer candidates, which signals a problem for the industry in general for the same reasons. That's e.g. why tech companies are funding programs so that girls aren't turned off a software career if that's what they fancy. Those details aside, in general my impression is that the industry isn't currently in any sort of stagnation of opportunities, with employees' salaries racing to the bottom to cling on those opportunities. On the opposite, there seems to be plenty of things still to be done, and not enough hands. If you dump a lot of new good candidates in the pool, they're going to be absorbed right away, even if they're all white American males.