OKR exist to align and motivate the company. It works top down and bottom up; the executives announce what the company is going to be doing for the next term, and it ripples down as each org and team sets goals that are aligned with the plan. That's all it has to be; a good thing done right.

Have you worked at a company where you had no idea what the plan was and where the company was headed? I have and it is frustrating. That is the kind of company that would benefit from the alignment that OKRs instill.