That certainly helps. You could also add talent concentration due to excellent universities and top-tier companies already being here. But the truth is that you can incorporate a business in less than a week here, employment is at-will, there are no unions or other such bullshit, taxes are low, the general way you deal with regulator is ask for forgiveness instead of ask for permission, etc.

Say I'm currently working on a project in the crypto or AI space. If I wanted to make it into a commercial product, do you think I'm gonna go to France or Germany? It might take me a few weeks just to get past the first layers of red-tape to get a business licence there. If I hire someone who turns out to be incompetent, I'm probably stuck with them until I gather enough evidence to justify firing. And I have to live in constant fear of the state deciding my business is illegal.

> funding a working healthcare

Btw the US healthcare system is the best in the world if you can afford it. Health insurance is usually provided through the employer. I can have an appointment with a doctor within days, emergency room wait time is on the order of minutes. Never had a problem with the quality of care.