Kny YOU are wrong an all counts here. YOur Rottie was bred to pull mik carts in Germany BTW.
Nobody here has the SLIGHTEST amt of K9 hisory (Vet wont share the real stuff, 2 busy sugar coating Pitts)
I know a lot about the Rottweiler & won't claim to be an expert...but it's obvious you don't....but you need to dig further back to understand the "Butcher's Dog". You seem to know shit...but keep opening your mouth & looking like a complete idiot.
The breed was used back in the Roman Empire. Mainly it's definitive role was to protect, herd, & guard the cattle for the Legions during their conquests. If you understand warfare, you would understand that food is a key element to troop movement. Without food & supplies, your army is weak & can not move far or win battles. These dogs were intended & successful in protecting/herding the cattle for the Roman Armies.
Basically, this is just a simple understanding of the history/development of the breed. While in Rottweil, the dogs because of their size & strength were used for day to day chores (like pulling milk wagons). Back then, owning a horse required a lot of money for those who had little.