The "engineering" here is not what the guys in the video did, but what the guys back in WW2 did to design a vehicle that could be stripped and reassembled in the field.
By saying "that's what Jeeps are for" you are just taking it for granted... Vehicles don't grow on trees.
Looks like I failed miserably at asking this earlier, but I'm just looking for a reference to the stated design goals. If it is the reason you state, I'm just looking for a reference to it.
Asking "what Jeeps are for" was meant to get at the design goals and I did not mean to dis what is otherwise a very fascinating design choice.
By saying "that's what Jeeps are for" you are just taking it for granted... Vehicles don't grow on trees.