Because currently, it seems like the only thing it’s recording are downvotes. Meanwhile upvotes are completely ignored, leading to pretty much every profile I see having a negative reputation.
Also, I have a very fragile ego and my -6 reputation hurts a bit.
Right but it’s more than that too though - because if someone is following you on mastodon, and they boost your comment - that adds to your reputation. Which makes more sense than liking stuff increasing your reputation, because people on mastodon (or other platforms) will like stuff just to tell you they like it, but boosting means they think more people should see it - which is more equivalent to an upvote than a like is.