The point was not the pharisee's, the point was the following teaching by Christ Himself:
" 'These people honor me with their lips,
but their hearts are far from me.
9They worship me in vain;
their teachings are but rules taught by men.'[4] "
10Jesus called the crowd to him and said, "Listen and understand. 11What goes into a man's mouth does not make him 'unclean,' but what comes out of his mouth, that is what makes him 'unclean.' "
Food?