1. We're going to play 10-15 games less than most top teams this year because we were such an abomination last year.
2. A lot of top teams don't have 3 first team 9's (RVP, Rooney, Welbeck) and basically nobody has two 9's as good as we do, and the teams that do (Barca and Bayern) have 9's capable of playing out wide (Suarez/Messi and Gotze/Muller).
If Hernandez moved to Real Madrid, he'd be behind Benzema, sure, but he'd still probably get more playing time, since whenever Ancelotti wanted a striker in and Benzema wasn't fit or was being rested (2 games a week fairly often), it would be Hernandez playing, presumably (Jese is another option, as is James as a false 9).
More realistically, Hernandez could go to Arsenal, Chelsea or Juventus and be the 2nd choice number 9 on a team playing 55 games this year.
Side note: It's kind of insane to call Atletico a level below us; They were probably the best team in Europe last year, literally one minute away from winning La Liga and the Champions League. They lost 3 key starters (Costa, Felipe Luis, Courtois) but replaced each one with a ready-made replacement (Mandzukic, Siquiera, Oblak) and added Griezmann too. They'd be favorites over any English team in a CL tie, save maybe Chelsea after their impressive summer.