You're the one talking about DoS. Notice how "rate-limiting" is a much more generic concept. For example, Hacker News rate-limits the amount of posts you can

You're the one talking about DoS. Notice how "rate-limiting" is a much more generic concept. For example, Hacker News rate-limits the amount of posts you can make in a window of time. That's not because they think you're trying to DoS them.