Making very poor decisions with real negative effects on riders and races.
Arranging the race schedule so two different races do not finish at the same time and place isn't rocket science. (And this has happened before, same stage, same race.)
I suspect the first time this happened, the race was under OBRA, a much smaller and poorer organization. I also suspect that if it had stayed under OBRA, they would have taken action so it wouldn't happen again. This time it is US Cycling putting on two UCI races. Doesn't get much bigger. Their screw-up caused a crash and cost pro riders places, money and recognition. (Last year's men's stage winner on target to do it again and hitting a woman fighting for her place on the GC. Huh?)
US Cycling keeps finding new ways to keep me from becoming one of their fans.