Failure to call travels results in fouls being called on defenders because they have to [or at least are more likely to] resort to illegal tactics to regain their position.
Saw it in Adelaide Saturday night. Steven Weigh made a four-step move to the basket and the defender got called for a foul after Weigh's fourth step. Wasn't the only example of the phenomenon one, but this was a very clear one. If looked that way live, and was reinforced with the footwork crystal clear on the big screen c/o NBL.tv.
However, the issue is probably bigger in mid court than in the paint. Defender makes position to defend or 'direct' the player with the ball based on the established pivot foot only to have the player with the ball take off with the wrong [illegal] foot, often with a couple of steps before the ball is put on the floor, and the defender is immediately out of position and either called for a foul or forced to try to re-position to defend a player who has used illegal footwork to gain an unfair advantage.
Call what's there. At least then the official only has to decide on the footwork, not also decide whether or not the illegal footwork gave the attacking player [in the ref's opinion!] an unfair advantage. Odds are it did, or the rule wouldn't be there in the first place.
The officials repeatedly prove they struggle to make good basic decisions, so why burden them with deciding whether or not something gives a player an unfair advantage? Isn't that how we got into the problems with the un-called contact issue of recent years in the first place? And now we're heading down the same path again?!
Just let's play by the rules and call what's there, then everyone knows what's going on. An error of judgement is an error. An opinion [about advantage or not]is an opinion, and every opinion is valid and equal, whether its the opinion of a ref, coach, player or spectator, so introducing the 'advantage' issue is opening Pandora's box and increasing the risk of more friction between refs, coaches and players. It also provides a 'cop out' line for lack of referee concentration, poor positioning or just plain bad/poor decisions.
Do we really want to go there? I don't.