Native English speakers are by far the worst communicators outside of their country, in the world.
Yes, but you're not comparing like with like. When our ancestors civilised large swathes of the world, we didn't just drag them out of the Dark Ages. We also bequeathed them our English language. It's an international language, it's used by Americans (almost) who distribute it in films worldwide. The best music will mainly be sung in English. English is often used in trade and commerce. It's also the univeral language of aviation.
I go to Czech Republic a fair bit. and try with the very difficult language. But Czech is only useful in CZ. If a Czech learns English, it is far more useful to them than just visiting England/UK.
The Dutch kid was speaking English because Dutch are very pro British for some reason and it's an international language. Doubt he would have spoken German so well, even though it's next door.

