Imagine the person who cannot afford a book or paper on a particular topic. Should they not have access to the information?
I agree, as always there is nuance, but zlib et al fulfill a need for certain people. In b4 public libraries, they aren't equal around the world, depend on geographic proximity and add latency to the learning process.
Have found DMs on Twitter to be high ROI. Recruiters in the UK can be hit or miss as it's such a low barrier of entry job. Some out there that really are worth their weight in gold and others out there that give them all a bad name.