>* You make it sound like all that is needed to develop (as tachyonbeam pointed out) European equivalents to "Google, Duckduckgo, YouTube, Uber, Facebook, Dropbox, Amazon, Netflix, etc" is to shut down access from anywhere in Europe to and from these companies.*

This isn’t far fetched - it’s a well understood result of Chinas Great Firewall. With American companies banned in China, Chinese companies were free to copy American firms and capture the value of the Chinese market. Protectionism has work, and even India is considering it