>>530936085
The game has too many factors, like race tracks having different layouts as well as different builds of umas. You can't discredit something like Breath of Fresh Air just because "it can proc early/late" because there might be some debuffers that sap your stamina early/mid/late race. In a perfect race, its less effective but there won't always be a perfect race. A good trainer takes these factors into account and try to minimize the RNG factor as much as possible.