I agree with the OP. I think that on some days when it's super busy at the park and people get jammed together it's rough when there are also big strollers involved.
But there are also dummies out there who are also walking along with their entourage of 5 people straight across who won't have the decency to step aside, or those who decide to have a conversation with their entire family in the middle of a busy walkway (like by Indy).
THAT is what bugs me the most. In a big crowd, no way to pass so I reserve myself to having to follow the person in front of me and then they stop right in the middle and stand there oblivious that anyone might be behind them. I'm not capable of not saying something. I'm not a complete jerk in that situation but I will make a smart alec comment usually. Like "good place to stop". DW hates when I do that but its my way to vent in the moment and then its forgotten as soon as we have passed them and are on our way.