Not to say that China isn’t belligerent only that I think they’re generally less corrosive to the world

PH, Peru and Argentina all have the same complaints on China regarding fishing. Their aggressive ghost fleets will show up to take everything and ram them out of their own waters. To say they are less aggressive is giving good will they haven’t earned. Likely because they don’t have the same power projection the west currently has.

that there are plenty of other countries who are interested in World stability and will pick up the mantle at the US leaves on the ground.

I think an issue with this statement is that it just assumes things will work out. I specifically brought up the csto as a non western example of an empire collapsing causing a war among two other parties that were in that sphere of influence as they say. I also brought up ancaps as another unserious group of wishful thinking. I don’t have an answer but I am calling yours out as handwaving real concerns.