But that matters. On the very specific point that you cited, on the question of whether voter ID requirements increase or decrease electoral turnout, the evidence from the United States is highly mixed. On average, taken as a sort of collection of evidence, suggests that the stricter the voter ID requirements are, the more they depress turnout. They particularly depress turnout of vulnerable citizens and citizens who move on a regular basis.
I think that evidence is not controversial. You could obviously find an article that states something different, but in general, the evidence from the United States is quite clear.