Because what fits in and it's fun.

We are one big family. Sometimes our normal pots (Fissler) are simply too small. So a really big pot should ran. The WMF is really big. Since even for 7 people fit everything in. Feels good, looks good, is practical, well distributed heat and it's fun to cook with it. In our other pots but the handle remains completely cold. At WMF you have to take a potholder sometimes. But he is also cheaper. The small hole in the lid seems to be perfect, it just boils nothing about.