To answer Wharfinger's question: The reason to get rid of a set of words would be because you don't like it.
True, getting rid of a set of words you like can be fun, but only for a while. It might seem like a good game, but try going without prepositions for just 30 minutes (of conversation). It's not easy.
As a rule, keep the stuff that people like, and get rid of the stuff they don't like.
And yes, there are some people who don't like profanity. And here we come to the point that the choice is not arbitrary; while the sounds may be chosen by the whims of fate, the meanings have a distinct and somewhat unsavoury place in our social milieu, and you know it.
#37 in a series of slightly sarcastic writeups.