>see e.g. AirbusOne single successful company can't sustain the tech economy of a continent.
Even if they lost the commercial aviation crown after Boeing's flops, the US still has far more local champions with insane margins successful in other critical areas (military, web services, mobile, cloud, GPUs, AI, CPUs, etc) than the EU could ever dream of.
I'm sure working at Airbus or ASML is nice but those two companies can't employ all of EU's tech workers and fund EU's monetary deficits, especially since both are registered in the NL tax heaven.