I'd have to confirm, but I think most people consider "voter fraud" to be fraud conducted individually by voters. The claim that voter IDs are required is a putative measure against this. Thing is, that fraud is exceedingly expensive to conduct relative to impacts.

Voting machine hacks are wholesale to voter fraud's retail, and can swing far more votes, within or across multiple states. Systemic suppression methods, including role exclusion, gerrymandering, and the like, are also similarly far more efficient.