No, they haven't. They spent the first decade after WW2 repairing the damage left behind by the Japanese and their Civil War, and then managed to subsequently starve tens of millions afterwards in several missteps, and then managed to right themselves. They then spent three to four decades lifting about thrice the US population out of extreme abject poverty, and then in the last 20 years catching up. And catch up they have; they are already the leaders in green technology and EVs, already manufacture some of their own chips, already have indigenous military aerospace capability, which they are now expanding to civilian use.