Blue collar machine learning jobs center around data labeling: https://www.techrepublic.com/article/is-data-labeling-the-ne...

I don't ever see the actual modeling work around AI becoming blue collar. It's complex and worth the price to the companies that can build a business around it. The data labeling, however, can be pretty simple.

In a way that's already happened, though maybe not in the way youre thinking of. Machine learning data is more and more being collected by volunteers or paid content curators. These jobs are generally low pay and in foreign countries. There's a huge outsourcing of "blue collar" mechanical Turks going on right now that is essential to most supervised learning methods.