Cause its the quality of life it gives you. You can order your food, and if you dont like it you can ask for anotherone till someone denys you.
It looks quite funny using it.
Its a meme.
The problem is, what you gonna do with rampage alone as choppa?
You dont have any meaning full debuff profitable of it like slayer.
And you also miss the additional aoe dot, does id still proc stuff btw??
Order has also the way better setup for pure dmg.
So i would just prefer setting around getting my food deliverd, salt included.
Enjoying the brum brum chop ya all fasta style. While all order cries about 550 dps and a bugged pull mechanic on server, i ll dream about the order dps setup.
Edit: my personal view