If you follow people of certain hobbies - for example, retro computing - then it's a great way to discover others sharing the same interest. You can check their timeline to see if that's someone you want to follow or just choose not to. And if you really dislike someone, you can just block them. I think that retweets/boosts become a really good discovery mechanism here.

If your hobby is e.g., NFL Football, then yeah, the signal/noise ratio makes retweets a terrible thing that just clutters your feed.