I think your premise is way off, unless you're talking about sports that people don't follow at all rather than sports they only follow superficially. Just look at how much complaining there is about the BCS and tell me that hypercritical eye is reserved for soccer. You really don't see people tying their frustration with the BCS as some sort of inherent flaw in football that implies it's less worthy of your time and fandom. Same with inconsistencies/frustrations in other sports like balks/leaning into pitches/instant replay in baseball, late game fouls in basketball, holding/pass interference(takedowns) in football, etc. It's entirely possible that the PK system is actually stupid though. I'm not going to make that call but isn't it possible that any sport could have a rule that is just dumb? Once upon a time the forward pass was considered unsportsmanlike in football. NBA Finals games used to be decided in overtime when one team would hold the ball for the entire period because there was no shot clock. Those are objectively dumb things that needed to be changed. In any case, I don't even follow hockey that much, but I know the rule changes made a few years ago were designed ot make the game more fan friendly and up tempo. It isn't a vendetta against soccer.