Here's a kind of non-explanation ("we saw a lot of other people doing it and the activists said it's good"): https://cbc.ca/1.5626669
@coldwave Kind of. It reads like someone asked, "Why now?" and the author spent most of her time considering the "now" instead of the "why", going on about George Floyd and recent events. There's also a lot on the lack of diversity among media employees, which would be important if they were changing their hiring policy but is kind of tangential to the style change.
In particular, she mentions the "proper noun" principle that underpinned their old style rule, but the thought is left unfinished. There's no indication what principle of English now supersedes it to justify the new rule.
It's important to note that this is the CBC, not a private broadcaster which is supposed to change according to shifting preferences and market pressure. One of its functions is to serve as a language model for people learning, improving, or maintaining proficiency in Canadian English, so it's supposed to observe the principles of the language pretty zealously.
@khird good article. wouldn't call it a non-explanation. there's far more reasons and perspectives in the article than that. and enough hints towards history, sources, and people that anyone extra-curious could dig further.