I think I need to take issue to an extent with these two points.
In the first case it is, perhaps sadly, the case, that for many people, if there is no contact, there is no foul. This is especially true in model yachting where the incident comes and goes so quickly. A lesson learned early on in dinghy racing is that on occasion you have to decide which boat to hit. It’s not ideal but the chances of someone else, anyone else, seeing the perceived foul without any contact is vanishingly small.
In the second case, those are the rules. I may have my own reasons to put you about - Sailing is a tactical sport not a drag race (despite the current farce that is the America’s Cup). I don’t have to explain myself for standing on - perhaps frustrating the port tacker is sufficient tactical advantage in itself.