https://www.zdnet.com/article/inside-indias-captcha-solving-...
I guess it's not entirely contradictory as it comes under outsourcing haha..
Also Im involved a bit in making automated captcha systems for.. ahem.. research. I've noticed a lot of the manual service providers in China have already pivoted to data labeling services. Most of them probably already have the workers, infrastructure, and pipeline in place, which is why I think original poster makes a good point
Besides, how often do you see captchas anyway? If you're not using super privacy / tracking protective browsers, they'll remain hidden for the most part, and the ones you see are the simple 'check this box' variety.
It literally breaks the internet for me, I had to go through recapchas 12-15 times a day.