Back in the 70's, our Shooting Federation of Canada match rifle triggers had to lift a 3 pound weight.
In the 1980's, this was reduced to 2.2 pounds. These were MATCH rifles.
I qualified MASTER with the 3 pound triggers of the 70's. That means over 90% from all 3 positions.
My current BP match rifle, the 14 bore Sporting Rifle has a 4 pound "simple" trigger. Short pull, no creep and sweet it is.
Is a set trigger of mere ounces easier to hit with? Yes, sometimes. Can they out-shoot simple triggers - yes again, sometimes.