Another note to the same quote: for me it looks like classic half mask respirator is not that "good" against COVID, as it only filters on the intake, not the way, out. At least my cheap one does. Therefor, while it prevents you from getting it, it does not stop you from spreading it. Right?

Sure, that might very well be what you aim for, but from my understanding, FFP2 should prevent both, at least theoretically, since wearing them correctly is another point of failure.