Why would somebody play an non-caster?

[Gwendol]

So half of the posters say that it's because casters are "easy mode".

However, mundanes even suck atbeing a challange, since you only need an horridly built wizard(barr Conjuration, anybody?) to create a liability,

Err, I think most agree that the main reason people choose to play a non-caster is because they want, as in that is their wish and a source of enjoyment.