I gotta wonder - how in the world can you ever get enough failed SSH login attempts to noticeably affect system performance? I usually have several cloud serve

I gotta wonder - how in the world can you ever get enough failed SSH login attempts to noticeably affect system performance? I usually have several cloud servers running with a normally secured SSHD running. There's some failed login attempts yeah. I've never seen even 1% CPU usage from them. I doubt even posting my server address on every hacking forum I could find and daring them to try and hack me would result in getting enough failed SSH login attempts to blip my CPU usage. I have no idea how that could even happen, aside from somebody intentionally targeting your server with a really weird attack for whatever reason.