Flyback, I couldn't disagree with you more.
If there were only one program, it would have to do all the things that all the people who might want to use it need to do, from absolute beginners, who would find 90% of the functions mysterious, not useful, distracting and in the way, to people who might find it does not do everything they want, or people who just don't like the way it works or does a certain thing.
MS Word tries to be all things to all people, and as a result it's awful. Far better to use the tool (or toolkit) suited to what you want to do and your level of understanding and preferred workflow, than an entire workshop kitted out for mechanics and builders and electronicists and carpenters and... you get the picture.
Personally I'm glad there are so many programs out there - it's meant I could try a few and settle with one I like. I just wish there was so much choice of word processors!
Oh and BTW, you mention Germany, and "they use a certain..." Is this all Germans (who design PCB's) you refer to? I rather suspect the German proletariat are more like the rest of the world and use whatever they are happy with - I'm sure not all German companies have agreed to use the same software!