More seriously - owning shares in us companies create scary tax implications that require some advice when having us clients. US banking system is stuck is in the 1800s and dealing with it is a very serious pain. US legal system, unlike European is very unfriendly for individuals - its just infeasible to do stuff yourself on a shoestring budget, without hiring professionals.
As someone who has to work integrating to banks, yeah this is sad but true.
Millions of new businesses are started every year in the US on a shoestring and without hiring professionals.
Despite not even being a tax form some of these (e.g. FBAR) have penalties of 50% of the unreported amount. It's not something you want to leave to chance.
I don't think that's meaningful. There are 320 million people in the U.S., and only a tiny proportion of people anywhere would consider opening their business in another country.
That doesn't mean there isn't a high barrier to accessing the U.S. legal system. For example, as we know, well-funded parties often defeat poorer parties by simply threatening legal action, because the poorer party cannot afford to use the legal system.