i do not understand why the unicode type is needed inside the program. Why can't you treat everything as bytes? It's not like you can't concatenate two string

i do not understand why the unicode type is needed inside the program. Why can't you treat everything as bytes? It's not like you can't concatenate two strings of bytes! If these bytes mean something or something else, this is a concern for the user of the program that feeds it these bytes. The program itself could be oblivious to that.