Opportunistic is a bit harsh. I think it's more to force Netflix to make this a priority. Sure they're "working on it", but I doubt it's a huge priority since it affects, percentage wise, a small portion of their audience.

I bought my mother a third-party device for her television so she could stream Netflix last Christmas only to find out that Closed Captioning wasn't supported. It was pretty depressing - she couldn't use it at all because she is hearing impaired.

There's a reason why there are laws in place for compliance - often times good business strategy and "accessibility for all" don't align.