Guessing you don't get much rain there ?.... in which case... totally understandable
I guess it's different challenges for folks in different geographic areas . Riding muddy trails here will make you unpopular. Most of the time, the trails will dry out sufficiently after a day or two, so we learn to be patient. People put in a lot of work maintaining trails, and one impatient clown can really tear up a trail that isn't dried out yet.
Different areas have different dirt. After it's rained a lot, there are a few areas where the dirt is mostly decomposed granite. It's GREAT after a rain. The range of hills where I live, though, is completely different. The mud accumulates on your tires, making them bigger and bigger, until they just won't roll any more.
At the end of summer, many trails are totally blown out, and we long for the rains and the resultant hero dirt.