A foul shouldn't just be contact, there should be enough contact to bring someone down and that wasn't enough. Vasquez feels Benatia's hand on his back and decides to go down without even trying to be physical and overcome the contact, winning penalties has become an art in finding the right time and way to fall down after you've felt contact; when the contact is not hard enough to bring you down naturally.
A similar example is with the Mane dive against Southampton I think, where he took 1 second to go down eventhough the defender technically did hit his foot when he went in for the tackle, subsequently Mane was given a yellow for diving and everyone agreed it was a dive. Then in another match during the week another player won a penalty, sorry I can't remember the names or matches, where similarly a defender had a slight touch on the player's foot but he feel down in perfect synchronization and won the penalty (without any commentators complaining it was a dive).
These incidents are what's irritating me, fouls in the box aren't about whether there is enough contact to bring a player down, it's become a dark art of being able to act well enough to fall down the moment you get touched and it's become more and more common and accepted within the game.