Well, but the alternative is currently representative democracy. You are saying that these politicians are understanding these issues better. With all I see from politicians I cannot agree. And in Switzerland and the US direct democracy is working well enough.
Both the swiss and the german system are working well, I don't know which one is better, both have their pros and cons. I think if you want to have more direct democracy (after all we do have referendums but only on state level) you have to go the full way and implement a swiss like system or else you will run into things like the brexit referendum.