But players are not supposed to call minor travels, as they do not impact play (1.3.10.). In other areas of the rules, the main principle is that the rules assume that players will play according to the rules. To that end, this rule is inconsistent.
From a playing experience, players call travel very rarely anyway and as other people have pointed out, focusing on it might put the marker at a disadvantage. So I don’t necessarily see the risk.
But I understand if WFDF does not want to deviate from USAU on this issue.