How does this happen?

Last night I watched "Up and Down", a 2004 movie from the Czech Republic. It was very good. Lovely photography and very funny situations. Moving, too. (It's described as a comedy/drama.) It has subtitles, which I don't mind because I find it enjoyable to hear the original actors' voices. In a dubbed movie, you lose so much. These actors had some extremely funny lines -- and their voices played a vital role in the comedic delivery.

So tell me. Why are foreign comedies funny...while all we get is Adam Sandler?