I know you're making a joke, but this really is a (ihmo very interesting) mess:
In this case this is just multiple single points of failure though, at least for the larger ones.
If you lose one of the big red ones in the middle (common carotid arteries) you'll have a major stroke killing essentially three quarters of one of your hemispheres.
There's another pair in the spine (vertebral arteries, not visible) which supply the posterior and lower parts of your brain, but they're also not redundant. Also sometimes, one's doing basically all of the heavy lifting, and sometimes the other one doesn't exist at all.
If only Jesus had installed some service loops and hot spares in me, in case of hardware failure. For “gods perfect creation” I sure have a lot of design oversights.
technically already is, considering the smartest way to “properly” cable manage the human body is to create as many points of potential failure as possible to mitigate an all-in-one death
geekworking said most of this i’m just the messenger
Not necessarily, evolution doesn't do global optimization, it does local optimization. Meaning that there could be more efficient solutions, but in order to get there you'd have to iterate through less efficient solutions, which is typically not the norm.