This article has a very limited view and such tells a wrong story. Don't know what is the intention behind.
Personally, I still know parts out of mind from Faust and William Tell, but don't know anything from Shakespeare.
There's a special exception for Max Frisch which I discovered mid-twenties and was very thankful I did not have to read it in school.
So, well, the "why" is: maybe later in your life.
(There's another "why" in "you an your friends aren't necessarily representative for Germany as a whole, bit that would have been a rather cheap comment)
The UK only has a single author, poet and source of inspiration for period movies: Shakespeare. Theatres only run musicals and Shakespeare. British litterature is either Harry Potter or Shakespeare. And if a Brit must quote a classic, it must be Shakespeare.
Literature is not what the English lack!
But it does.
Maybe it's just my poor schooling but the only author we ever /had/ to read was Shakespeare, my mother introduced me to Orwell, my grandfather to Dickens.
The schools only ever introduced Shakespear, like he was the only notable author in the last thousand years.
Just in case anyone is still around from those days that was Park Senior High School, Swindon, Wilts, 1970-1974. The more I hear of other people's schooling the more grateful I am for the schools I went to
and to be fair, it was Warwickshire.
Some of the books which most influenced my world view are English; Dawkins (game theory, other writers criticize religion better) and Orwell ("Down and Out in Paris and London", partly also "Animal farm" etc).
You can't generalize millions of people. For a more extreme example of that:
The majority of my intellectual (for lack of a better word) "idols" are probably from USA -- but quite a few people that moved there claims the US average levels of general education is abysmal (except for the specific subject someone studied).
The funniest variant of this was when an old student friend pointed out that his many Americans friends knew more about European history than the average European. (He was active in SCA.)
But if someone writes about the stage art scene, then the german stage art scene becomes "Germany" and suddenly it all makes prefect sense. Classics get reinterpreted to add new twists, but that only really works if the original material is sufficiently well known to the audience. It's hardly surprising that in a country with a different language (and different literary tradition) than English, only few of the works of Shakespeare reach that threshold.