Yeah I'd tend to agree with the issues it being a homogenizing term as a whole (ie. often used awkwardly), however in this context where we're using it in order to refer to homogenization (that being, those who have had historically less power in white/male dominated industry), it seems a little softer of a homogenizing term as compared to 'non-white'.

Although, my perspective is of course informed by how I've internalized my local community use this language in certain ways. In South Africa, where white people are just 8% of the population, it seems stranger to make reference to the subject through that caveat rather than in, say, a US context the inverse may seem more uncontroversially worded.

Interestingly, as a side, I'm considered coloured in South Africa - a term taken on here by mixed race folks as a disambiguation of the American term, in a similar fashion to how you describe the origin of the PoC term.