And your assumption was right. The original premise was "how can I get notified within seconds after tremors occur" and not "please send an email for me to read when I happen to use a desktop PC".
Some people spend most of their day on their laptops and try to limit phone time. People in this thread are all assuming everyone does things they way they do, but not all people are the same.
Email delivery can easily be delayed 1-2 minutes. I’m not sure it’s the best method for an early warning system.
I usually get my emails instantly, but if they get delayed, then they get delayed. At least a chance of getting a notification quickly is far better than nothing.