You're not convinced that going from "living in the most economically dominant and militarily powerful country in the world" to "not" is going to somehow not be a painful experience?
You can use the "I am not convinced" line for anything. "I am not convinced that being homeless is worse than living in a nice house" but... ok, what would convince you?
Maybe it's good that other groups of people besides Americans and Europeans can make leading contributions to economic growth, science and technology.
Maybe America's dominance is mainly good for the rich and those who like to invade countries on a whim. I don't care about either of those groups.
When UK Parliament wanted Zuk to answer some tough question about his company facilitating electoral fraud, he simply refused to show up. Even first world nations struggle in dealing with American corporation, which often act as if they are above the law.
God forbid you are a developing nation. British American Tabacco has taken poor developing nations to court for trying to ban children from smoking (!!) and got compenation and the law repealed
I am not even mentioning illegal stuff: bribes, threats, drone strikes, strong-arming, etc.
Even the EU was strong armed when it comes to GPS:
https://www.theguardian.com/uk/2003/dec/08/world.internation...
Those that think that American economic advantage was won in a 'fair game' are super naive
I'm not convinced that the rise of China will be so bad. Boomers and neocons want us to think so, but their "arguments" are mostly just paranoia and sentimentality.