It's impossible to look at the US judicial system and come away with the conclusion that it heedless of the concerns of Floridians hearing Alaskan cases. The US system is almost literally the opposite of that.
And the ECHR are extremely limited in which cases they can hear. Thus, we agree that just as scotus doesn't mean that you have a bunch of gun-slingin' Texans passing laws to control the lives of portland Oregon hipsters, we don't have frog-eating French controlling the lives of the Roast Beefs.
We have a Supreme Court, and we need one because we're one country under one Constitution and one Federal Government, but it's been bitterly divisive and I don't know why any country would want to subject themselves to that without those constraints.