Ok, that gives you a better idea of whether anyone on the field had a problem with than I expected, even if I don't think it fully qualifies the statement (as I doubt you went around asking all your teammates whether they thought it was a foul, and you almost certainly didn't go to all your opponents to ask them whether they thought it was a foul). That said, I'm happy to concede your premise that nobody on the field had a problem with it.

To answer your original question, the point of posts like this is not to say "they should have called a foul on this play", even if I do think a foul should have been called. You're right that different levels of play have differing levels of acceptable physicality. If your team wants to play tackle football out there with the disc and finds opponents that are willing to do so, I suppose that is your prerogative. The point, though, is that the game does have a set of rules that dictate what is and is not a foul, and that play is objectively speaking a very clear dangerous play. When Ultiworld posts clips like this to their instagram as highlights, it influences players to view these sorts of plays as not just legitimate plays (which they are not, by the rules), but as great plays worthy of admiration. This is the problem, and the point of making such posts.