I agree with GP. If I am trying to, let's say, watch something on Netflix and it is not working, a status page would confirm that Netflix is down in my region, and I would know that there is nothing wrong with my connection, DNS, or any other potential cause.

Because of this reason I believe they would not be pointless if they were simply status pages, instead of "incident response pages". My hypothesis for them being this way instead is it is too much transparency for some companies for PR and legal reasons.