You are correct, the initial point of contact was not the head if you look at these multiple angles.
I do not like how Egli is being vilified here so please do not take it that way. But I am not sure why people keep referring to the Egli hit as a bigger guy hitting a smaller guy. According to various sources or ones you choose to believe. Egli is listed at only 165 on elite prospects which is lighter than Nylander is. Maybe it just plays to the narrative that Egli was picking on a smaller guy, and again he is being made the villain in this unfortunate result that knocked a high profile player perhaps out of the tournament.
Let's just say they are of similar sizes. I think you nailed it in your analysis. If one is to treat both players as equals and not that one is likely a lower draft pick, the other a first rounder. There was blame to share from both players. Replays show Egli targeted the shoulder, while Nylander was careless carrying the puck through the neutral zone.
Again a player carrying the puck through the neutral zone should expect to be checked. Egli is not expected to give him a free pass where he would have to face his bench if Nylander waltzed in to score on that play. He was finishing a check.
It's hockey, its a fast game. This won't be the last time we are likely to discuss these events.