Spotted...

Because not enough effort has been made to express it in German. There's very rarely a compelling reason for loan words, especially today. Every time a pointless loan word is adopted, a language loses a potential word.

I'm sure there's a good way of expressing this idea in German.

There's always a way to express it in German; all the complex words are constructed from combinations of simpler words. I've always thought this makes German a much more egalitarian language than English, because there's a chance for any reasonably intelligent German speaker to work out what any academic/philospher/whatever is talking about. Can't do that in English unless you have a classical education.