Yes. It’s faster. I’m a scientist who authors papers and needs to read an enormous number of them. My ability to easily search and access dozens of papers per day is what makes my job possible. The purpose of the scientific publishing industry is to support that activity and the general dissemination of knowledge. The fact that a random website in Eastern Europe is able to simplify that task is a good thing, and reflects negatively on the existing publishing industry. (As the author of some of those papers publishers are charging to access, I can assure you that the scientists involved don’t mind that people are bypassing journals and their terrible web UX in order to read and cite scientific work.) The fact that my University already pays for all these journals and it’s still more efficient to access them via Sci-Hub only makes the publishing industry look worse, since it means they’re not accomplishing their core purpose, the one that’s supposed to justify their continued existence in this world.