Disagree. Think about advertisers. A lot of products popular in the US are popular in the EU. When it comes to marketing the latest Hollywood blockbuster if they can't reach half a billion people through Facebook they'll go elsewhere. If half a billion people suddenly disappear from Facebook those people who have friends and family there will turn to other communication systems and Facebook may get used less and less.
Dangerous thinking? It was just an answer to a claim about the wealth they create as if they are exempt to be taxed because they create wealth.
> Over time, these companies will make infinitely more from developing nations outside of the EU than they would from the EU.
Over time, but I bet that any of those companies wouldn't trade the profit of one of the greatest markets in the world now for an hypothetical
> especially if the EU is taxing them heavily.
EU is not taxing heavily
Additionally, even if you say "don't care, if they leave we'll just build our own companies", now you are hamstringing the global growth of those companies.
(I'm just going to assume the companies that leave are not going to put your homegrown companies and people at a very serious technological disadvantage, which they might)
This is of course, why the EU wants everyone on the bus.