He’s not advocating Europe separate from the US, but become a military superpower in its own right by having as large a military as the US. I am sure both Petr Pavel and Joe Biden agree on enforcing the “rules-based international order”.
To think that the EU suddenly wants to ditch the US because they see them as a burden/dangerous is wishful thinking. In fact the only countries willing to do that might be France, because the local bourgeois don’t like to be limited by the US on pursuing their imperialist interests in Africa.