It's mostly a misunderstanding of what is valued in German society. The common trope is that German society covets precision. This is not the case. German society covets unwavering precision in the adherence to norms. To the point where innovation is akin to revolution in the negative sense, and pigheadedness in procedure is considered a workplace virtue. In the mean time nothing gets done. Source: expat in Germany.

Also bureaucracy is through the roof in everything, i have no idea who the fuck thinks of germany as efficient.

I have no doubt their bureaucrats perform world-class efficiency in their handing out, filling in, faxing and archiving a sophisticated system of paper forms.

I guess it's the trap of getting complacent and stopping modernizing as soon as you've convinced yourself you have the best system in the world.

As an outside observation, Germans seem to make things better than they need to be in a detrimental way. For example, we redid one of our bathroom showers using the Schluter Kerdi waterpoofing system. They have very specific instructions on how to space the screws, how to seal the screws, how to seal the edges, how to mix the thinset, and probably some other things I can't remember off the top of my head. They put it through a battery of tests, including going under 100' of water. Who needs that? Don't worry about it.

This stuff replaces cement board, which isn't strictly waterproof, at least not on its own. It's also significantly more expensive.

I do think it's worthwhile for a home DIYer to get. The instructions are clear and it's less likely you'll screw something up that could result in disaster. That said, this thing is just waiting for a Japanese company to come along and make something 90% as good for 50% of the price. That's basically what happened in the German vs Japanese car market, and there's already some products on this market like that.