Again, while I agree that playing to not lose involves less risks, this doesn't characterize all the games between Caruana and Carlsen or Nepomniachtchi and Carlsen. Keep in mind that just because Caruana or Nepo aren't sac-ing a piece every game, doesn't mean they're not going for sharp positions and taking risks, that's just not how chess is played at the top level. The inbalances that they capitalize off of are nuances of position and structure, not necessarily just material.
You can thank alpha zero and Dubov for Magnus's willingness to sacrifice for activity, I think anyone watching a Carlsen game from before around 2018 would call Carlsen "aggressive", if anything Carlsen was known more to play into an endgame that he'd win off his persistence and accuracy. I also don't think this is accurate even for his more recent classical games. He'll take opportunities to go into inbalances that he feels are easier for him to navigate than his opponent, but he certainly isn't Tal and I think this mischaracterization also serves to downplay Caruana and Nepo's role in reaching sharp, lively positions in their matches, while overplaying Carlsen's. Again, all I am arguing is that Caruana's play in 2018 was both remarkable and admirable, and that it would be impossible for him to hold a drawn match against possibly the greatest chess player of all time if he only played to neutralize every position and didn't arrive with the mindset to win.
I disagree with your point about Armageddon for two reasons. 1. Draw odds means that one player is always playing to "not lose" which is exactly what you're critiquing. Sure white has to play aggressively, but black will be playing to neutralize all life in the position, and I personally don't watch to watch only Berlin defense games - it's bad enough that the Marshall has been reduced to a drawing weapon. 2. At lower time formats we see less deep lines and ideas and more mistakes. I personally enjoy high-quality chess and Armageddon isn't designed to produce that, it's designed to produce a decisive result. Plus, sacrifices aren't even unique to Armageddon, they might be rare, but queen sacrifices are still being played in top level chess, Dubov-Karjakin just last year comes to mind, and they're even more frequent in Rapid, Danyyil-Shirov being one that was extremely famous last year as well.