Why is the career mode always online?!

I bought the game PGA Tour Road to the Masters but I see that the career mode is needs a permanent Internet connection. Why is that?!I do not care about costumization or other online functions.I want to play the single player offline experience.I have a fast Internet connection but not that stable.And what will happen if EA closes the servers and the career mode will disappear?At least make the career mode offline before you close the servers in the future.I hope you will take into account my post .Thanks in advance.