Xfinity SPAM/Phishing emails

Every day I receive at least one and usually several phishing messages about “updated my email information” because the old one is “going out of service.”  I would like to understand why Xfinity cannot create a filter that takes those [Edited: Language] messages out long before they reach my mailbox.  If I can create filters that send certain subject lines or senders to a specific folder, why can’t Xfinity set a filter for these!?!?  The subject line is not that difficult—a search for “xfinity including random characters should not be that difficult!  I am [Edited: Language] sick of forwarding all of those messages to Comcast Spam Abuse (abuse@comcast.net).