The problem is that Europe does not have a choice here. The Greenland steal crisis is on hold, but not fixed. America clearly shown it will abuse any ties there are - it will lock accounts to tech to bully and get what they want. It will use tariffs to bully countries to make laws, release presidents friends criminals from prisons, you name it.
Meanwhile, America seems to take Russian side in Russian expansion. Meanwhile, America is just cause major oil issue and potentially triggered next refugees crisis. Meanwhile, America clearly shown it does not even pretend to care bout war crimes and international law at all. It is sponsoring afd and other fascist parties all around the Europe while openly insulting Europe. Maybe it is too late for disconnect, but not trying would basically be a suicide for Europe.
It would be great if it was not "us vs them". But it is "us vs them". Trust toward American made Europe super vulnerable.
The European Union has many friendly trading partners left in the world and is also receiving an influx of previously US based talent. The trade decisions of the US aren't forcing the EU into isolationism. This is where your argument goes wrong IMO.
The US government has announced that it plans to actively support extreme right wing parties in the EU. If this comes to pass, it is a direct attack on political freedom in those countries, separate from any economic policy decisions. I don't know how well EU countries can defend themselves against this in the short amd medium term. Some counties have better defenses than others. But I see virtually all of them struggling.
While asserting itself militarily. This is the Roman Republic —> Empire transition.