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Probably because "right over the top" can be a 2D descriptor of 3D space. We therefore have no idea how close this object was to the plane. It is entirely possible it was directly above the plane but high enough that it actually wasn't in commercial airspace.

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There is no such thing as "commercial airspace." I think you're confusing Class A with commercial, as that's primarily where commercial airliners fly, but there's nothing saying that military operations can't happen there too, so long as they are IFR

I was simply using the terminology OP was using and explaining why "right over the top" doesn't mean there was potential for collision.

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