[Yeri]

Because you'd have a ton of downtime and they'd rather hide it if they could. :)

I used to work at a very big cloud service provider, and as the initial comment mentioned, we'd get a ton of escalations/alerts in a day, but the majority didn't necessarily warrant a status page update (only affecting X% of users, or not 'major' enough, or not having any visible public impact).

I don't really agree with that, but that was how it was. A manger would decide whether or not to update the status page, the wording was reviewed before being posted, etc. All that takes a lot of time.