Replying to Park skiing on epic powder days?

I see a lot of edits and videos in which people seem to be only riding the park on what looks like to be awesome powder days. Why is that? Wouldn't you want to ski epic powder that you only get every once in while, than ski park which is there always? Maybe i am just biased because we don't get to many epic powder days in New Mexico so we have to take advantage of every single one. But it just seems weird to me that people would ski only park on epic powder days.