That's only in post 2010s period, aka post apps and social media.
The boom in 80s/90s/2000s all of it kicked off from the deep technical know-how that rest of the planet just didn't have.
People can feel free to disagree, but they are really lying to themselves if they think anywhere else on the planet there was the sheer amount of tech talent as US until even 2010s.
Things have changed since and US is now largely valued because of it's large market and stuff, hence the off-shoring of so much of the technical and even advanced work.
But this was not the case before. With AI pushing the cost of building stuff to near 0 I don't see why you even need the US market to scale up an idea enough to prove viability. Sure the company might have to move to US, but there is no reason for it to be built in US anymore.