Homebrewing in Europe is definitely a mixed bag, and local conditions dictate how the practice has developed. In the US, homebrewing evolved out of a desire for something better than the bland lagers which was all that was available in the stores 30 years ago, then expanded when people realized just what was possible. That is quite similar to the motivation in Belgium and the Netherlands, where brewing iconic, individual beers is celebrated. In the UK the “Real Ale” movement incentivized homebrewing. It took off as a reaction to the loss of traditional brews and brewing practices.
In Finland, home to the highest beer taxes in the EU, I’ve met lots of people who homebrewed in college, but the stopped “when they got a job and could afford real beer”. That is now changing, as craft brewing is starting to take a hold here.
Germany has always had craft brewing at a very high quality, and with typical German efficiency, has managed to deliver that to consumers at very low prices. The initial motivation just isn’t the same.