Basically tamed beefalos with no rider should still benefit from their type/saddle damage+speed bonuses when they are attacking mobs by themselves.
Right now they just revert to standard wild beef mode with mediocre moving speed and 34 dmg headbutts.
It makes no sense they would magically forget about their skills and gear just because there's nobody humping their back.
It's only fair especially when there's a rule that prevents players from hopping on when the beefs fighting for their life.