Any modern language is a mirror of the population that use that language, and it'll change as the population changes whether people like it or not; nothing anybody can do about that. This is especially true of English as it is essentially the global lingua franca.
I remember all the fuss in the fifties and sixties about us young 'uns using a myriad of words like cool, guy, chick etc. These and many more are now in common use and the language is none the poorer for that. As has been
said above, none of this means that the older words and forms of usage have to be dismissed, though.