Gatekeeping is bad, but these annual PR pieces are trying to ride the good reputation that annual reports containing audited financials have.
On a side note the graphic design in this is amazing
If the purpose of your organization is to make money, then I can see a company's annual report needing to have detailed financials. Most readers will be interested in those details, given it is a corporation. But I don't think a non-profit's annual report needs more detailed financials that they gave in this one, because their purpose to improve the world, provide a public service, etc., and staying financially sustainable is just a means to that end.
If they had released an "annual financial report" like this, I could see your point.
It's explicitly a PR piece: "look at all the cool stuff we're doing and are involved in!"