Granted, doesn't mean you should rewire your house using YouTube videos
http://www.cnn.com/2017/01/13/us/mother-house-youtube-build-...
I've been living in Australia the past year (which has a lot of Germans) and twice I helped someone change a flat tyre. Both times a German also came to assist, and both times it was an American who didnt know how to change a flat (there arent that many of them in Aus).
Americans have become complacent and lazy, with no sense of "know how" or "make do." Hell, kids don't even know how to clean and cook a rabbit, let alone how to catch one with a snare. If the zombie apocalypse ever happened for real, The Walking Dead wouldn't last a full season. Everyone would starve to death.
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...
Finally, if we experience some type of catastrophoc event: total war, nuclear winter, natural disaster, I will still be eating.
I suspect that any scenario in which hunting/trapping becomes a valuable skill for a significant portion of the population is also a situation where knowing how to operate an animal drawn vehicle is also a useful skill.
This fiction about civilization collapsing, but then surviving on your wits and hunting skill, is the stuff of YA novels.
(The US currently consumes 8 billion chickens a year)
Besides, the northern US has more extreme winter weather than Germany, so based on this, Americans should be better at changing their tires than Germans.