alt Hacker Newsthere is no certificate higher than C2, so "minimum" C2 is ridicerlus, ackchyually...
I assume.thats your point here, but to bystanders: C2 is nearly native speaker language proficiency, nuanced, precise, eloquent.
if language production is the job, or impeccable understanding is a must have, like as a psychotherapist, then C2 is a reasonable requirement.
in contrast you can study in german language at a German university with C1 proficiency already.
C2 is better than the language proficiency of the median native speaker.
A C2 speaker is comparable to a highly educated native speaker with a master degree who reads regularly.