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.
It’s like talking to the police: the more you talk, the more you incriminate yourself. Never talk to the police.
A modification of this is used when giving a deposition. You want to answer the question without giving any more information than necessary. If they ask about time you say it was after 9 in the morning. You don’t say it was 9:15 because you’d just gotten your coffee and had checked your watch.