Did it really "turn out" to have come from Germany?
Or did you actually buy it from a German seller?
Got a link to it?
That is a good point.
Crap advice. Most adapters don't comply with any countries standards. Many don't have earth continuity. A decent 13 amp plug is cheaper than an adapter.
The problem is fitting a 13 amp plug is no longer taught in school, and even when it was, people often got it wrong, that's why today it has to come with a 13A plug already fitted.
In theory, yes. Where are all the reports of the consequences of that in Germany and all the other countries that use reversible Schuko plugs?
There are a load of problems in countries where the Schuko plug is used, however it is hard to separate out, which accident was caused by what, when they also use generators and leads with plugs on both ends to keep things running in a power cut.
Also education is different, if you live in a dangerous environment one has to learn how to protect ones self, talk to any health and safety officer and they will tell you the percentage of people involved in accidents within first month of starting a new job is far higher than those who have worked there for a year or more, we learn what is dangerous and avoid it, so a German will likely unplug a table lamp before changing a E27 bulb, but a Brit will use the switch off the lamp only, we are not use to line - neutral swap or E27 bulbs, we have used BA22d for years, so we are far more likely to get caught out to a German, as Germans expect dangerous items, we expect items to be safe.
It is partly as a result of German systems in the UK that I have a mauled hand, in UK safety switches red or yellow, should be same in Germany however seems they don't bother and use black, so a safety switch was removed to gain access without the person realising he had removed a safety feature.