I would have guessed that it's more likely that these rips are easily available precisely because there are some old devices out there with a breakable DRM that streaming services can't disable from their end because the devices are too important to their customer base.

Like, there's probably some old smart TV or set-top box platform that Netflix has to support because they have half a million subscribers using it, but it won't receive firmware updates and can only support some old DRM that has been broken.