Ok, uh....what about this?
I've decided that vests serve no functional purpose.
I've never in my life walked around outside in chilly weather thinking "man, my core is super comfortable, but my arms are just BURNING UP!!"
Conversely, every time I throw on a vest as part of my wardrobe and spend any significant time outside, I wind up with cold arms.
If it's a suitvest, fine. If you want to show off your guns, fine. But otherwise, buying a vest is just paying the same price for a garment without arms on it.
Also, you might be mistaken for a John Denver fan.