This IS the fixed state.
Previously it gave a huge bonus, probably based on the same rationale of “effort = improvement” you state, but that doesn’t make any sense.
As @joker points out, why is the default trigger so bad that improving it means your gun gets significantly more accurate?
Basically a match trigger is useful if your gun is already incredibly well tuned and accurate, but for a typical pistol or even rifle the benefit is too small to bother with.