My conclusion is that any such system needs to be "complete" or almost complete to be useful. By system, I mean a service or some handcrafted system where I could track anything. In all fairness, Sci-Hub partially fits the bill here and it's a big plus to society.
But the point is Google Scholar is complete in the sense that with a high probability I will find any paper I'm looking for along with reliable metadata. That's great, but the fact that they go above and beyond to prevent sharing that data is IMO backwards, against all academic research principles and this should raise questions within the research communities that rely on it.