Look at what he's saying, it's not a deep insight but there is a credible amount of truth to it.
At the bottom entry level units do defer. Boots stick around for morning formation after weekend leave still buzzed drunk because they're just told what to do and face consequences otherwise.
But then in the Corps the TIG promotions tend to weed those types out so that the motivated and qualified ones go upward the chain as NCOs. Then TIS promotions tend to be push those more qualified into SNCO roles.
To say that every single boot, or that every single service member is immediately capable of stepping up to be field officers because the one charge that was saluted all the time got sniped off is a ridiculous assertion.
But it is heavily incorporated, and more specifically in the Corps, for lateral movement up, or even down, a few ranks.
That's setup to optimize for the resiliency of the organization whereas in a corporation that's fragile because people working there are merely linked by bank account and therefore inspire no loyalty.