That makes sense, even though we tend to call that a c-card. I don't think there are any written standards directing an instructor to verify scuba training status before issuing an EAN card. PADI may also want to avoid a scenario where their name is on a scuba "certification" card but not a single dive has occurred within a PADI course. Wouldn't be surprised if cards like Fish ID and Aware also contain that language.
edit: You can see their list of certification versus specialty versus experience courses with the drop down at this link.
PADI Course Catalog | PADI
Wreck and Aow has the same verbage in the mailer.
"Padi validation card"
And a box directly under it says "This is NOT a certification card"