It's related in the sense that it works in the background, using the spare resources you have. Whether you see the thing it does as a good thing or theft is really up to you. I guess some people had their own reasons for not supporting the SETI@home objectives either. In any case, I'm perfectly happy with an analogy like "it's like going to the library, making a copy of all the books and making the copies available for everyone for free".
Of course. Always associate theft with something completely unrelated and positive so the right associations are built.
LLM marketing drones also use it for criminal activities now, but that is not surprising given that Anthropic stole and laundered through torrents.