Old Comcast email owned by another person still fowarding to me after nearly a decade

Maybe a decade ago, I used a Comcast email on my parents Comcast plan (probably shouldn't post the actual address here, but I can message it to a Comcast Admin). My parents have since discontinued that service, and that old email address went back into the wild, and is now owned by another person from accross the country with my same name. I get all sorts of email for this person now because the forwarding rule that I had set up back when I owned the account to send mail from that old Comcast account to my gmail account is still active, even though someone else now owns that account.

When an account is released and taken over by a new customer, why in the world would all the settings not be reset to default, especially forwarding rules? This is a major security concern for people getting recycled email addresses.