Nobody did this yet, right?
Obvious meme is obvious.
Classic meme is classic anyways.
Can someone explain that to me?
The man whose face has been photoshopped onto the card is David Tennant, who is most famous for playing Barty Crouch Jr. in the fourth Harry Potter film (Goblet of Fire). He's had some bit roles in other film and TV, but they aren't important. In the film, Barty Crouch Jr. uses Polyjuice Potion to take on the guise of Alastor "Mad-Eye" Moody. For most of this time, Moody is the Defense Against the Dark Arts teacher at the Hogwarts School of Witchcraft and Wizardry. He is thus known to the students (including Harry Potter, the titular main character) as
Professor Moody. In Canada and the US, the title of "Professor" is granted not only to academic teachers but also to scholars with
doctorates.
Therefore, it can be said that David Tennant is a "Doctor", which is why he was associated with that card.
Edit: an alternative face to photoshop onto the Doctor card would be that of actor Matt Smith. He is famous for playing Patrick Bateman in American Psycho (the musical). Patrick is a character who allegedly lives a double life, except that he hallucinates and is thus an unreliable narrator. It could be said that his memory and narration are
doctored.
Matt Smith has had some bit roles in film and TV as well, including an obscure British show that nobody watches which coincidentally also starred David Tennant for some time. But that piece of esoteric trivia isn't relevant here.