Maybe slightly over-analyzed. Jeep engineers also thought an aluminum steering box was a good idea.yes and no. It shows turbulence, but doesn't show overall flow over the vehicle. Doesn't show a vehicle remotely close to the aerodynamic brick a jeep is. And an important aspect is how is the air used in the engine bay, I don't know but you could be affecting cooling of your engine at speed under load (but again I don't know, just saying its possible). The one thing I know, is the engineers making the decisions at Jeep know a whole lot more than we do on how air flow is used on the wrangler for different driving conditions.
On a front engine vehicle, the rear end aerodynamics are a little simpler to understand with what they affect (drag, downforce, lift on underside), but front end (to windshield) there are a lot of things going on with engine intake, cooling, etc that make it hard to know how the air is used.
And I'm not saying doing hood vents is a bad idea. I'm just saying we (forum members and jeep enthusiasts) do not know the side effects of doing hood ventilation. I myself mostly only wheel my jeep with highway driving to locations. I'm on the fence if I want to turn my rubicon's fake vents into water sealed air vents.