I think this is an artifact of how SLAs are tied to billing. Anyone who had ever billed a corporation knows how they will jerk you around. It’s obvious that you won’t get a straight answer if you go and ask a company how much they owe you. That’s what a status page is. It’s the company’s first offer in the negotiation on how much they owe you for the outage. You need to calculate your own number in response.
Maybe a more scalable solution would be a third-party company that sells this information. I think there’s a lot of money to be made there.