What SAFe does is provide some sort of visibility and accountability to senior management. (Which waterfall did before it) Until the Agile community can come up with a reliable way of identifying and firing the low performers for senior management, they will keep pushing down requirements like SAFe on the organization. Fortunately, the level of opacity between budget managers (P/L) vs execution managers usually doesn't get this bad until you've got 10 - 20K employees.