It’s unlikely you’ll lose it all, but suppose you write a clever app — maybe a cvs editor.
Suppose you find out your cvs editor infringes on a patent and you’re liable. Suppose some business suffers data loss and sues. These things do happen in Europe too.
Also, it’s just a matter of professionalism. A sole proprietor isn’t very professional and many medium-size businesses won’t do business with sole proprietorships.
The discussions is not about setting up an LLC in the EU, but specifically in Germany. Subsequent to that we are comparing this with other developed countries in the world, not all of which are in the EU, which is fine, and does not undermine the comparison.