You're saying that there are only 8 Germans alive who can do it.
and 6 of them have a 99.9% chance of dying within 10 years, given that they are 82+ years old. :)
On a serious note: A lot of immigrants make a lot of money (relatively speaking) right away since they are jack of all trades and are willing /have to learn. Things that a locksmith would charge you $150 and a plumber $200 and an electrician $xxx an immigrant can do all within an afternoon, all for living rent free as superintendent. Probably some rules and codes are bent but who's watching...
Germany might not have as much of a hunting culture as the US or Norway, but still a lot more so than Netherland. I would expect more Germans to know how to clean and cook a rabbit.