Ahh, I see it now. It's reflecting some of the mesh.
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Me, I guess.
There's a reason the RAM and CPU are oriented the way they are on a motherboard and happen to line up with the rear exhaust mount on a case. GPU aside, that's where all the heat is. It's better to pull cool air across those components and out the back of the case than to let the hot air around them naturally find its way out, heating up other components along the way.
An exhaust fan in close proximity to those components is a must. People switched to positive pressure set-ups to control dust build up.
A turbine engine is a terrible comparison.