To add on, in addition to needing more consistency and skill to brew something light in flavor, it also more difficult to brew a lager (which a Pilsner is) than

To add on, in addition to needing more consistency and skill to brew something light in flavor, it also more difficult to brew a lager (which a Pilsner is) than an ale -- the yeast involved are different, and the fermentation process is generally longer (more opportunity for stuff to go wrong) and more temperature sensitive (more opportunity for stuff to go wrong.)